Relieving pregnancy nausea: What helps during the first trimester
Table of Contents
- Pregnancy Nausea and Hyperemesis Gravidarum: Definition and Differences
- Hormones such as hCG and estrogen: Why the body reacts with nausea
- Vitamin B6 for Pregnancy-Related Nausea: A Micronutrient Under Scientific Scrutiny
- Ginger: A Traditional Home Remedy for the Stomach
- Blutzuckerschwankungen vermeiden: Ernährungstipps für den Alltag
- Conclusion: What to Know About Morning Sickness
- Frequently Asked Questions About Morning Sickness
- Well cared for during pregnancy
The joy of a positive pregnancy test is immense, yet not everything about the months ahead is pleasant. Whether in the morning, the evening, or throughout the entire day, pregnancy-related nausea affects up to 85 percent of expectant mothers. Two questions usually take center stage: how long the symptoms will last, and whether the baby is still receiving adequate nourishment when vomiting occurs. In this guide, you will find answers to both questions, learn why the body reacts to pregnancy with nausea in the first place, and discover the role that vitamin B6—as well as the traditional home remedy, ginger—can play in managing it.
Pregnancy Nausea and Hyperemesis Gravidarum: Definition and Differences
Mild to moderate nausea is one of the most common complaints during early pregnancy. In medical terms, this is known as emesis gravidarum—sometimes accompanied by occasional vomiting. Studies show that approximately 50 to 85 percent of all pregnant individuals are affected, with about half also experiencing vomiting.
Generally, there is no danger to the unborn baby; during this early stage of pregnancy, the fetus draws upon the mother’s existing reserves. Consequently, a temporary loss of appetite or a more limited diet does not cause the baby any short-term harm.
In rarer cases, a more severe form—known as hyperemesis gravidarum—can occur, which requires medical assessment. This significantly less common, severe condition affects only about 0.3 to 3 percent of pregnant individuals.
Warning signs that necessitate prompt medical evaluation include frequent vomiting—to the point where even liquids cannot be kept down—as well as dizziness, a rapid heartbeat, dark-colored urine, or a progressive deterioration in one’s overall condition.
What is the difference between typical pregnancy-related nausea (emesis gravidarum) and hyperemesis gravidarum?
Typical pregnancy-related nausea (emesis gravidarum) manifests as occasional nausea and sporadic vomiting, without compromising the intake of fluids or nutrients—there is no risk to the baby in such cases.
Hyperemesis gravidarum, by contrast, is a distinct medical condition, clinically defined by the following criteria:
- Vomiting more than five times a day
- Weight loss exceeding five percent of the initial body weight
- Signs of incipient dehydration, such as the presence of ketone bodies in the urine and electrolyte imbalances (specifically, a deficiency in potassium and sodium)
If left untreated, it increases the risk of low birth weight or restricted growth in the baby.
Treatment depends on the severity of the hyperemesis gravidarum: milder cases are managed through dietary adjustments, adequate fluid intake, and anti-nausea medication. In cases involving significant dehydration or persistent electrolyte imbalances, inpatient hospital care—including intravenous (IV) therapy—is required to restore the body’s fluid and electrolyte balance.
Hormones such as hCG and estrogen: Why the body reacts with nausea
During the first weeks of pregnancy, pregnancy hormones such as hCG (human chorionic gonadotropin) and GDF15 rise rapidly. Both are thought to activate the vomiting center in the brainstem, which triggers the typical sensation of nausea.
GDF15 has only recently become a focus of research: studies suggest that it is not the absolute amount of the hormone that is decisive, but rather how sensitive the mother’s body is to it—which could explain why some women are affected by pregnancy-related nausea much more severely than others.
At the same time, levels of estrogen, progesterone, and thyroid hormones undergo drastic changes. This hormonal shift places stress on the body and is also likely a trigger for nausea.
How long does pregnancy-related nausea last—and when is it at its worst?
For most women, pregnancy-related nausea lasts only a few weeks; it typically subsides by the end of the first trimester or during the second trimester. In about 15 to 20 percent of cases, it persists longer—sometimes continuing into the later months of pregnancy.
The nausea generally reaches its peak between the eighth and twelfth week of pregnancy—coinciding with the time when hCG levels are at their highest.
It is also possible to pinpoint when pregnancy-related nausea typically begins: it usually starts between the fourth and sixth week of pregnancy, often shortly after a missed period.
Vitamin B6 for Pregnancy-Related Nausea: A Micronutrient Under Scientific Scrutiny
Vitamin B6 is one of the micronutrients most frequently studied in the context of pregnancy-related nausea. This is due to its role within the nervous system: the body requires vitamin B6 to produce, among other things, GABA (gamma-aminobutyric acid)—the brain’s primary inhibitory (calming) neurotransmitter. Furthermore, vitamin B6 influences how hormone receptors respond to their respective signaling molecules, thereby contributing to the regulation of hormonal activity.
In the specific context of pregnancy-related nausea, research is also exploring whether vitamin B6 status affects the balance between excitatory serotonin and inhibitory GABA—and, consequently, one’s susceptibility to nausea signals originating from the vomiting center in the brainstem. Additionally, studies are investigating whether—and at what dosage—targeted vitamin B6 supplementation might reduce the frequency or intensity of nausea during pregnancy.
Since the appropriate dosage varies from person to person, any targeted supplementation should be discussed in advance with a physician or midwife.
Ginger: A Traditional Home Remedy for the Stomach
Ginger contains gingerols and shogaols—phytochemicals that give it its characteristic pungent taste. Traditionally, ginger is used as a home remedy for stomach complaints, for instance, in the form of tea.
Researchers are currently investigating how these compounds affect the gastrointestinal tract. Specifically, they are examining whether they stimulate gastric motility and accelerate gastric emptying. Another area of focus involves the intestines: researchers are exploring whether ginger inhibits nausea signals originating in the gut—a process where the neurotransmitter serotonin can trigger nausea by binding to a specific receptor.
The following provide short-term relief The complaints are usually addressed immediately:
- light endurance sport – ideally in the morning or during the day instead of just before going to bed
- Walk around
- Stretching exercises
- Massaging the legs
- warm or cold foot and leg baths, which many sufferers find pleasant
However, these measures are effective just look at the symptoms – the clarification is essential for long-term improvement Possible causes such as iron deficiency are crucial.
Conclusion: What to Know About Morning Sickness
Mild to moderate morning sickness is normal and does not mean that anything is wrong with the baby. It is primarily caused by a sharp rise in pregnancy hormones, to which the body can sometimes react sensitively.
Eating regular, small meals helps keep blood sugar levels stable and can alleviate symptoms in daily life. Vitamin B6 and ginger are among the most well-researched micronutrient-based approaches for early pregnancy—though any supplementation should always be discussed with a doctor or midwife.
It is important to watch for warning signs: persistent vomiting, significant weight loss, or indications of dehydration require prompt medical evaluation, as these could be signs of hyperemesis gravidarum. For the vast majority of women, however, the nausea subsides noticeably by the end of the first trimester.
Frequently Asked Questions About Morning Sickness
Nausea typically begins between the fourth and sixth week of pregnancy—often shortly after a missed period. For many women, it is therefore one of the earliest noticeable signs of pregnancy.
The peak of pregnancy-related nausea typically occurs between the eighth and twelfth week of pregnancy—coinciding with the highest levels of hCG in the blood.
For most women, nausea subsides by the end of the first trimester. This typically happens around the twelfth week of pregnancy.
In about 13 out of 100 women, it persists beyond the 20th week – this is generally no cause for concern, but rather a normal variation in the course of pregnancy. However, if symptoms are severe or worsening, you should seek medical advice.
The primary trigger is the rapid rise in the pregnancy hormones hCG and GDF15, accompanied by changes in estrogen and thyroid hormone levels. This hormonal shift stimulates the vomiting center in the brain.
Contributing factors may also include an empty stomach—which leads to a drop in blood sugar—as well as a heightened sense of smell and taste during pregnancy.
An increased risk of pregnancy-related nausea is observed in cases such as multiple pregnancies or when a woman has experienced nausea during a previous pregnancy. A family predisposition or a tendency toward motion sickness or migraine-related nausea can also raise the risk. However, it is not possible to make a definitive prediction.
Pregnancy-related nausea is often interpreted as an indication of active hormone production and the growth of the placenta. Furthermore, studies have shown that women who experience morning sickness have lower miscarriage rates. This correlation is even more pronounced in cases involving vomiting, compared to nausea alone.
The so-called "embryo protection hypothesis" suggests that pregnancy-related nausea evolved as a protective mechanism: it is thought to prevent the expectant mother from consuming potentially harmful foods—especially during the first trimester, when the embryo is particularly sensitive to chemical influences while its organs are developing.
Conversely, the absence of nausea does not in any way imply that something is wrong; the experience varies significantly from one woman to another.
Pregnancy-related nausea is not caused by a deficiency in a single nutrient; rather, the body is undergoing a phase of hormonal adjustment.
Vitamin B6 may play a role, however, as it contributes to the regulation of hormonal activity. The extent to which vitamin B6 levels influence this is a subject of ongoing research. Any supplementation should be discussed with a doctor or midwife.
In cases of persistent vomiting, the body’s fluid and electrolyte balance may also be disrupted—this, too, should be evaluated by a medical professional.
For mild to moderate symptoms, everyday measures—such as eating regular, small meals, staying well-hydrated, and getting plenty of rest—are often helpful. If symptoms persist or worsen, you should consult a doctor; there are also specific medical treatment options available, for example, doxylamine in combination with pyridoxine (vitamin B6).
Vitamin B6 acts as a cofactor in the metabolism of neurotransmitters, such as the calming agent GABA. A recent analysis revealed a correlation between vitamin B6 status—measured by the level of PLP (pyridoxal 5'-phosphate) in the blood—and the duration of symptoms: the higher the PLP level, the more quickly nausea and vomiting subsided.
In cases of severe hyperemesis gravidarum, medical treatment—often requiring hospitalization—is necessary.
The exact causes have not yet been fully determined. The primary theory under discussion is an increased sensitivity to the hormone GDF15, which rises significantly during pregnancy and stimulates the vomiting center in the brainstem. A particularly sharp or rapid increase in HCG levels is also thought to play a role.
As with the milder form, the peak typically occurs between the eighth and twelfth week of pregnancy. However, unlike common pregnancy-related nausea, the symptoms of hyperemesis gravidarum persist at a high level for significantly longer—often not subsiding until between the 16th and 20th week.
If left untreated, hyperemesis gravidarum can lead to dehydration, electrolyte imbalances, and malnutrition. In rare, severe cases, a vitamin B1 deficiency can also result in Wernicke encephalopathy—a neurological complication. For the child, there is an increased risk of growth restriction and premature birth. For many affected individuals, the persistent strain is also accompanied by significant psychological distress; professional support can help alleviate this burden.
Medical care is necessary if one is unable to keep fluids down for an extended period, if weight loss exceeds five percent of the initial body weight, or if signs of dehydration appear—in such cases, treatment often takes place in a hospital setting, involving the administration of intravenous fluids.
In cases of typical, mild to moderate pregnancy-related nausea, there is no risk to the baby, as its nutritional requirements during the first trimester are still low, and the mother’s body can compensate for short-term shortfalls using its own reserves.
In contrast, in cases of hyperemesis gravidarum—characterized by persistent vomiting and significant weight loss—medical treatment is necessary to ensure that both mother and child receive adequate nourishment.
Well cared for during pregnancy
Ready for immediate dispatch - Delivery time approx. 2-5 days
10 mg of highly bioavailable vitamin B6 in its natural, active form – plus choline
Ready for immediate dispatch - Delivery time approx. 2-5 days
Literature
Allgood, V. E. und Cidlowski, J. A. (1992): Vitamin B6 modulates transcriptional activation by multiple members of the steroid hormone receptor superfamily. J Biol Chem. 267(6):3819–3824. https://www.jbc.org/article/S0021-9258(19)50599-3/pdf
American College of Obstetricians and Gynecologists (2018): Nausea and Vomiting of Pregnancy. ACOG Practice Bulletin No. 189. Obstet Gynecol. 131(1):e15–e30. https://www.acog.org/clinical/clinical-guidance/practice-bulletin/articles/2018/01/nausea-and-vomiting-of-pregnancy
Arzneimittelkommission der deutschen Ärzteschaft (2015): Schwangerschaftserbrechen. Arzneiverordnung in der Praxis (AVP). 42(2):61–64. https://akdae.de/Arzneimitteltherapie/AVP/Artikel/201502/061h/index.php
Fejzo, M. S. et al. (2019): Nausea and vomiting of pregnancy and hyperemesis gravidarum. Nature Reviews Disease Primers. 5(1):62. https://pubmed.ncbi.nlm.nih.gov/31515515/
Fejzo, M. S. et al. (2024): GDF15 linked to maternal risk of nausea and vomiting during pregnancy. Nature. 625(7996):760–767. https://www.nature.com/articles/s41586-023-06921-9
Flaxman, S. M. and Sherman, P. W. (2000): Morning sickness: a mechanism for protecting mother and embryo. Quarterly Review of Biology. 75(2):113–148. https://www.journals.uchicago.edu/doi/abs/10.1086/393377
Gao Y, Wang T, et al. (2026): Vitamin B6 in nausea and vomiting of pregnancy: metabolism, mechanisms, and clinical implications". Front. Nutr. 13. https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2026.1836915/full
Gao, P. et al. (2025): Effectiveness of ginger supplementation in alleviating hyperemesis gravidarum: a systematic review and meta-analysis. Am J Transl Res. 17(3):1568–1579. https://pubmed.ncbi.nlm.nih.gov/40226035/
Gao, Z. et al. (2026): Association between serum PLP levels and the natural resolution of nausea and vomiting in pregnancy: a secondary analysis. Front Nutr. 13:1745093. https://pmc.ncbi.nlm.nih.gov/articles/PMC12926342/
Herrell, H. E. (2014): Nausea and Vomiting of Pregnancy. Am Fam Physician. 89(12):965–970. https://www.aafp.org/pubs/afp/issues/2014/0615/p965.html
Hu, S. et al. (2025): Sensory signals for nausea. Trends Neurosci. 48(10):780-791. https://pmc.ncbi.nlm.nih.gov/articles/PMC12506644/
Jayawardena, R. et al. (2023): The effects of pyridoxine (vitamin B6) supplementation in nausea and vomiting during pregnancy: a systematic review and meta-analysis. Arch Gynecol Obstet. 308(4):1075–1084. https://pubmed.ncbi.nlm.nih.gov/36719452/
Lete, I. und Allué, J. (2016): The Effectiveness of Ginger in the Prevention of Nausea and Vomiting during Pregnancy and Chemotherapy. Integr Med Insights. 11:11-17. https://pmc.ncbi.nlm.nih.gov/articles/PMC4818021/
Makwana, R. et al. (2022): Synergistic augmentation of rhythmic myogenic contractions of human stomach by arginine vasopressin and adrenaline: Implications for the induction of nausea. British Journal of Pharmacology. 179(24):5305–5322. https://pmc.ncbi.nlm.nih.gov/articles/PMC9826163/
Mathew, P. und Thoppil, D. (2022): Hypoglycemia. StatPearls Publishing, Treasure Island (FL). Zuletzt aktualisiert: 26.12.2022. https://www.ncbi.nlm.nih.gov/books/NBK534841/
Mayo Clinic (2025): Morning sickness – Symptoms and causes. https://www.mayoclinic.org/diseases-conditions/morning-sickness/symptoms-causes/syc-20375254
Rondanelli, M. et al. (2025): A Food Pyramid and Nutritional Strategies for Managing Nausea and Vomiting During Pregnancy: A Systematic Review. Foods. 14(3):373. https://pubmed.ncbi.nlm.nih.gov/39941966/
Vadakekut, E. S. and Mahdy, H. (2025): Hyperemesis Gravidarum. StatPearls [Internet]. StatPearls Publishing, Treasure Island (FL). https://www.ncbi.nlm.nih.gov/books/NBK532917/
