How likely is it to become pregnant when having unprotected sexual intercourse on the first day of a menstrual cycle ? Is it a sign when the menstrual cycle (unlike being the usual 3-4 days time period) to only last one day and the bleeding stops completely the next day after intercourse and have no cramps ?
Hi, Thanks for asking. I understand your concern.  Conception is impossible without ovulation.ovulation can not take place during menstruation (it is 14 days prior to expected date of next period) -so NI chance of pregnancy with unprotected sex on 1st day of menses.  But you had scanty bleeding in following day of sex....in case you don't get normal bleeding in coming few days... please remember. Conception due to previous sex in last month is possible it would be followed by scanty bleeding due to implantation bleeding.  Pregnancy test should follow scanty bleeding... Aafter a week to exclude pregnancy.  Thanks.