E
ExGratia
Guest
I haven’t ever seen anything that would indicate ovulation occurring more than 24 hours apart in any of the NFP sources I’ve seen… Implantation bleeding, according to my OB can actually happen a few times, as the baby grows, if the uterus is sensitive.
Actually, twins have been conceived weeks apart, and even with different fathers!
Google “twins conceived on different days” and you’ll get news articles. There’s just not a lot of information out there for twins. 
Here’s one link (see number 7):
multiples.about.com/od/funfacts/tp/Facts-About-Fraternal-Twins.htm
Actually, twins have been conceived weeks apart, and even with different fathers!
Here’s one link (see number 7):
multiples.about.com/od/funfacts/tp/Facts-About-Fraternal-Twins.htm