Is It Morning Sickness or Food Poisoning? Pregnancy Signs - Obstetrics and Gynecology

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Uncertain if pregnant?


My girlfriend started feeling nauseous after eating leftover food yesterday, and she still feels the same today.
We haven't had sexual intercourse, but we were intimate a week before her menstrual period, although there was no penetration, just external contact.
She was also aroused, and I had some discharge as well.
However, her menstrual cycle was normal this month.
I'm unsure why she keeps feeling nauseous; I don't know if it's morning sickness or if she has an upset stomach from the food.

1234, 20~29 year old female. Ask Date: 2016/01/01

Dr. Tian Yiwen reply Obstetrics and Gynecology


You can purchase a pregnancy test to confirm pregnancy, as it may also be related to gastrointestinal issues.

Reply Date: 2016/01/01

More Info


Determining whether your girlfriend is experiencing morning sickness or food poisoning can be quite challenging, especially given the context of her recent eating habits and the timing of her menstrual cycle. Let's break down the symptoms and factors involved to provide a clearer understanding.

Morning Sickness vs. Food Poisoning:
1. Morning Sickness:
- Morning sickness is a common symptom experienced by many pregnant women, typically occurring during the first trimester. It can manifest as nausea and vomiting, often triggered by certain smells, foods, or even the act of eating.

- Symptoms usually start around the sixth week of pregnancy and can last until the end of the first trimester, although some women may experience it for a longer duration.

- Morning sickness is often characterized by a feeling of nausea that can occur at any time of the day, not just in the morning.

2. Food Poisoning:
- Food poisoning results from consuming contaminated food or beverages. Symptoms can include nausea, vomiting, diarrhea, abdominal cramps, and sometimes fever.

- The onset of food poisoning symptoms can occur within hours after eating contaminated food, but it can also take days, depending on the type of bacteria or virus involved.

- If your girlfriend ate leftover food that was improperly stored, this could be a potential cause of her symptoms.

Factors to Consider:
- Timing of Symptoms: If her nausea started shortly after consuming the leftover food, it is more likely to be food poisoning. However, if she is within the timeframe of her expected menstrual cycle and has had unprotected intimate contact, pregnancy could be a possibility.


- Menstrual Cycle: You mentioned that her period has come normally this month. If she has had a regular menstrual cycle, it is less likely that she is pregnant, but it is not impossible. Some women experience bleeding during early pregnancy that can be mistaken for a period.

- Other Symptoms: Pay attention to other symptoms she may be experiencing. If she has diarrhea or severe abdominal pain, it leans more towards food poisoning. If she has other signs of pregnancy, such as breast tenderness or fatigue, it might suggest morning sickness.

What to Do Next:
1. Monitor Symptoms: Keep track of her symptoms over the next few hours or days. If she continues to feel nauseous or if her symptoms worsen, it may be wise to consult a healthcare professional.

2. Hydration: Ensure she stays hydrated, especially if she is vomiting. Drinking clear fluids can help prevent dehydration.

3. Seek Medical Advice: If her symptoms are severe or persistent, or if she experiences additional concerning symptoms such as high fever, severe abdominal pain, or blood in her vomit, seek medical attention immediately.

4. Pregnancy Test: If her symptoms persist and you suspect pregnancy, consider taking a home pregnancy test after a missed period for a more definitive answer.

In conclusion, distinguishing between morning sickness and food poisoning requires careful observation of symptoms and timing. Given the circumstances, it is essential to monitor her condition closely and seek medical advice if necessary. Remember, early intervention can be crucial in addressing any health concerns during this time.

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