A friend, who is a year away from being a doctor, told me it is impossible for a girl to get pregnant if she has unprotected sex on the second day of her period. Is this true?
Like most things in medicine it’s pretty much, but not absolutely true. The chances of pregancy would be miniscule. Ovulation occurs 14 days prior to your next period. An egg lives 24-48 hours, and viable sperm can stay around for about 5 days. So, if the woman’s NEXT period was going to be 21 days or less from the start of this one, she could become pregnant. Such short intervals between menses is rare but not unheard of.
i don’t trust anything that bleeds for 7 days & doesn’t die
Talk to your friend after she has been practicing a few years. She’ll find that when it comes to women of child-bearing age nothing is impossible. Highly unlikely, perhaps, but never impossible.
Besides, don’t you think that if there were 12-13 days a year when a woman could have sex and be guaranteed not to become pregnant the whole world would know about it?
Which is why he hasn’t had a date in 71/2 years…
Ahem.
To the OP. Typically, when women first start menstruating thier cycle is really wonky. A woman could be getting bleeding every 28 days, as per usual, or every 38 days, or every 48 days, like I did when I first started.
This makes the actual day of ovulation very hard to determine (just because you don’t get a period, doesn’t mean that you don’t ovulate). Theoretically, a woman could ovulate, and get her period a day or two later. Or ovulate and get hardcore breakthrough bleeding that she assumed was a period.
So - does it happen very often? No. Should people rely on this as a form of birth control? No.
Medical students represent that part of the medical totem pole hierarchy that is imbedded in the ground. They have just enough knowledge to be truly dangerous.
Yes, not only have I heard of people (women mostly) getting their period EVEN THOUGH they are pregnant…there are also lot’s of girls getting pregnant on birth control. Nothing’s impossible.
Many women aren’t regular. It can happen, but it is pretty rare, I’d say.
A 21 day cycle is not rare…in fact DUB (dysfunctional uterine bleeding) in this instance is only diagnosed when the cycle is shorter than 21 days (thus the implication that 21 days can be considered ‘normal’).
Oh, and re the OP…what everyone else has said: unlikely, but not impossible. 
In the future, don’t trust in the Pit.