10-09-2015, 06:57 PM
(10-09-2015, 06:47 PM)Belsnickel Wrote: Roughly 30 hours after conception.
Yeah, it's kind of a gray area so we can forgive the other 2 for saying zero (hope that wasn't on the quiz ).
According to this site the unborn baby (their words not mine) is considered a zygote for about 7 days (not sure how many seconds that is, but I'm thinking more than 0); at that point the unborn baby (their words not mine) becomes known as a blastocyst.
http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Pregnancy_week_by_week?open