Pregnancy Chances: Concerns About Unprotected Intercourse

Chance of Pregnancy

Hello doctor, my girlfriend has a menstrual cycle of about 32 to 35 days, with a period lasting 7 days.
Last month, her period was delayed and came 40 days later; it was originally due on September 3 and arrived on September 8, 5 days late.
On the evening of the 13th, which was the 6th day of her period, we had unprotected intercourse for about 7 to 8 thrusts, but I did not ejaculate because she was in pain, so I stopped.
On the morning of the 14th, there was still a small amount of menstrual blood, which ended by noon.
The mobile app indicates that her ovulation period is approximately 7 to 12 days later, with ovulation likely occurring after September 21.
I am really worried, so I came to consult with you, doctor.
Based on my description and my girlfriend's cycle, is there a possibility that she could be pregnant? I am concerned about the possibility of pregnancy from pre-ejaculate fluid or bulbourethral gland fluid.

Chen, 10~19 year old female. Ask Date: 2017/09/15

Dr. Huang Jianzhong reply Obstetrics and Gynecology

Your girlfriend's menstrual cycle is approximately 32 to 35 days, with a duration of 7 days.
Last month, her period was delayed by 5 days, starting on September 8 instead of September 3.
On the evening of the 13th, which was the 6th day of her period, we had unprotected intercourse for about 7 to 8 thrusts, but there was no ejaculation because she was in pain, so I stopped.
On the morning of the 14th, there was still a small amount of menstrual blood, which ended by noon.
The mobile app indicates that her ovulation period is approximately 7 to 12 days later, with ovulation likely occurring after September 21.
Given that her period started on September 8 and we had unprotected intercourse on the 13th, it is unlikely that she could become pregnant from that encounter.

Reply Date: 2017/09/15

More Info

When it comes to understanding the chances of pregnancy following unprotected intercourse, especially in the context of your girlfriend's menstrual cycle, there are several factors to consider. Based on the information you've provided, your girlfriend has a menstrual cycle that typically ranges from 32 to 35 days, with her last period starting on September 8. Given that menstrual cycles can vary, it's important to understand the timing of ovulation, which typically occurs about 14 days before the start of the next period.

In your case, if we assume a 32-day cycle, ovulation would likely occur around day 18 of her cycle (which would be around September 26). If her cycle is longer, say 35 days, ovulation could occur around day 21 (around September 29). Since you mentioned having unprotected intercourse on September 13, this would be just a few days after her period ended and well before her estimated ovulation window. Therefore, the likelihood of pregnancy from that encounter is relatively low.

However, it’s important to note that sperm can survive in the female reproductive tract for up to five days. If your girlfriend's ovulation occurs later than expected, there is a possibility that sperm from the intercourse on September 13 could still be viable when she ovulates. The concern about pre-ejaculate fluid (pre-cum) is valid, as it can contain sperm, although the quantity is typically much lower than in ejaculate. If there was any contact between pre-ejaculate and the vaginal canal, there is a slight risk of pregnancy.

Given that your girlfriend experienced a small amount of bleeding on September 14, it could be related to her menstrual cycle or possibly implantation bleeding if fertilization occurred. However, since you mentioned that she had just finished her period, it is more likely to be related to her menstrual cycle rather than an indication of pregnancy.

If you are both concerned about the possibility of pregnancy, there are a few steps you can take:
1. Wait for a Missed Period: If her next period is late, it would be advisable for her to take a home pregnancy test. These tests are most accurate when taken after a missed period.

2. Consult a Healthcare Provider: If there are any unusual symptoms or if there is still concern about potential pregnancy, consulting a healthcare provider can provide clarity and peace of mind.

3. Consider Contraceptive Options: If you are not ready for a pregnancy, discussing contraceptive options with your girlfriend is important. There are many methods available that can help prevent unintended pregnancies in the future.

4. Educate Yourselves on Fertility Awareness: Understanding the menstrual cycle, ovulation, and fertility can help in making informed decisions regarding sexual activity and contraception.

In summary, while the chances of pregnancy from the encounter on September 13 are low, it is not impossible. Monitoring her cycle and being aware of any changes can help both of you navigate this situation with more confidence. If there are any further concerns, do not hesitate to reach out to a healthcare professional for personalized advice.

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