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Suggest Paternity Tests During Pregnancy
Hi, I have a dilemma because a female claims she ended her period on July 13, 2010 (not sure if that’s true or not). We met for the first time and had sex on July 14, 2010 and many days after. On July 27, 2010 she got a blood test at the doctors and it said she was pregnant and the hcg level was at 27. Im not sure what she told the doctors and if that played a part in the due date or if its based off of ultrasounds and hormone levels but the due date given was April 25, 2011 by her doctor. A due date of April 15, 2011 was given based on a couple unexpected trips to the hospital for spotting. They checked her hormone levels and did measurements of the sac by transvaginal ultrasound at the hospital on Aug. 24, 2010. At the hospital they couldn t see the baby until the following week but tried measuring the sac and said she was approximately 5 weeks and 1 day based on what they could gather and see. She was having sex with multiple guys around the same time period for a while now. When would she have most likely gotten pregnant? Is finding out she’s pregnant within 13 days after having sex and having the hcg level at 27 likely? How soon can you find out you re pregnant by blood tests after having sex? How far along could she have been at the point she found out she was pregnant? How accurate is the due date based on the size of the baby by the ultrasound? How much could false information she’s giving them affect the due date? Also is it possible they couldn’t see the baby if she was more than 5 weeks pregnant (perhaps 7 or 8 weeks)? She’s very dishonest and a habitual liar and I am very stressed and don t want to wait months hoping it s not mine but not knowing. Based on all the facts given and the due date given by her doctor based on the ultrasound pics, what conclusion or opinion do you have on what’s going on and what I should think?
Mon, 25 Jan 2016
Hallow Dear,
I have gone through your complete history. Let me answer your questions one by one:
1. If she had her menses on July 13 and if you had a solitary intercourse on July 14, it is most unlikely that this intercourse has caused the pregnancy. The egg release takes place 14 days before the next expected menses. Considering her menstrual cycle to be of 30 days, the next menses were expected on August 12 and hence the day of egg release (ovulation) would be July 29. With Last menstrual period (LMP) on July 13, 2010, her due date would be April 20, 2011. Her ultrasonography calculates it to be April 24 2011, which congruent with this calculation. A couple of days difference is no difference in this calculations.
2. It is possible to diagnose pregnancy even a few days before missing a period by Beta hCG test on blood.
3. Clinically, we calculate the due date of delivery by formula DD = LMP + 9 months + 7 days. By ultrasonography, the due date is calculated by the size of the embryo, hence it is more accurate. Still usually there is no much difference in these two days. Considering the due date calculated by ultrasonography, she is giving correct information about her LMP as July 13, 2011.
4. Even after considering her history as fool proof, since you had sexual relations with her on the next day of her LMP, you cannot be the father of the child in her womb. However, to prove it scientifically, you may go for DNA test.
I am sure this clears your dilemma.
Dr. Nishikant Shrotri
I have gone through your complete history. Let me answer your questions one by one:
1. If she had her menses on July 13 and if you had a solitary intercourse on July 14, it is most unlikely that this intercourse has caused the pregnancy. The egg release takes place 14 days before the next expected menses. Considering her menstrual cycle to be of 30 days, the next menses were expected on August 12 and hence the day of egg release (ovulation) would be July 29. With Last menstrual period (LMP) on July 13, 2010, her due date would be April 20, 2011. Her ultrasonography calculates it to be April 24 2011, which congruent with this calculation. A couple of days difference is no difference in this calculations.
2. It is possible to diagnose pregnancy even a few days before missing a period by Beta hCG test on blood.
3. Clinically, we calculate the due date of delivery by formula DD = LMP + 9 months + 7 days. By ultrasonography, the due date is calculated by the size of the embryo, hence it is more accurate. Still usually there is no much difference in these two days. Considering the due date calculated by ultrasonography, she is giving correct information about her LMP as July 13, 2011.
4. Even after considering her history as fool proof, since you had sexual relations with her on the next day of her LMP, you cannot be the father of the child in her womb. However, to prove it scientifically, you may go for DNA test.
I am sure this clears your dilemma.
Dr. Nishikant Shrotri
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