Pregnancy Risks and Timing After Unprotected Intercourse - Obstetrics and Gynecology

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Pregnancy?


If intercourse occurs on the fifth day of menstruation with ejaculation inside, and then again with ejaculation inside seven days later, what is the likelihood of pregnancy? People say that you can take a pregnancy test 14 days after ejaculation to determine if you are pregnant.
How accurate is this? How many days after an egg is released from the ovary does it typically take for it to be shed during menstruation?

tian, 10~19 year old female. Ask Date: 2005/02/22

Dr. Mao Yikun reply Obstetrics and Gynecology


If your period is missed, please visit the clinic for a pregnancy test.

Reply Date: 2005/02/22

More Info


Understanding the risks of pregnancy and the timing of testing for pregnancy after unprotected intercourse is crucial for anyone who is sexually active. In your scenario, you had unprotected intercourse on the fifth day of your menstrual cycle and again seven days later, both times with ejaculation inside. To assess the likelihood of pregnancy, we need to consider several factors, including the timing of ovulation, the lifespan of sperm, and the menstrual cycle.

Typically, ovulation occurs about 14 days before the start of your next menstrual period. In a standard 28-day cycle, ovulation usually happens around day 14. However, since your cycle is longer (34 days), ovulation may occur later, around day 20 of your cycle. Sperm can live inside the female reproductive tract for up to five days, which means that if you had intercourse on day 5 and ovulated around day 20, there is a possibility that sperm from the earlier encounter could still be viable when the egg is released.

Regarding the second encounter, if it occurred around day 12 of your cycle, it is more likely to coincide with your ovulation window, increasing the chances of pregnancy. Therefore, the likelihood of becoming pregnant from these two instances of unprotected intercourse is significant, especially if ovulation occurs later in your cycle.

As for pregnancy testing, it is generally recommended to wait at least 14 days after potential conception for the most accurate results. This is because it takes time for the hormone human chorionic gonadotropin (hCG) to build up in your system to detectable levels. Testing too early can lead to false negatives, as the body may not have produced enough hCG yet.
Regarding your question about the menstrual cycle, if an egg is not fertilized, it typically disintegrates and is reabsorbed by the body or expelled during menstruation. If fertilization occurs, the fertilized egg will implant in the uterus, and the body will begin to produce hCG, which is what pregnancy tests detect.

In summary, if you had unprotected intercourse during your fertile window, there is a reasonable chance of pregnancy. If you suspect you might be pregnant, waiting for about two weeks after the last intercourse to take a pregnancy test will provide the most reliable result. If you have any concerns or experience symptoms of pregnancy or complications, it is advisable to consult a healthcare provider for further evaluation and guidance.

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