I knew for sure with my 1st and had him at 40 weeks and 4 days...was in labor in the hospital for 2 days though. Induced. My 2nd had no clue how far along went into labor naturally had him around 37 weeks.
The doctors told me my due date was November 20th which would have meant that I got pregnant in February. I knew I got pregnant 2 weeks later in March. I had to be induced at 41 weeks according to my doctor's but really I was 39 weeks 1 day.
i knew precisely when for my 1st and my water strangely broke on my due date at home. trust me no intervention methods (i.e. sex) were used at all, my husband was scared.. lmao! it broke that day but i had her 40wk1day. with my 2nd labor tried twice and had to be stopped with shots at 28wks and ultimately had her at 41wks via csection because she was late AND over 10lbs