Comments by "Beth Hentges" (@bethhentges) on "Fetal development" video.

  1. Dr. Campbell, You are measuring time from conception, but pregnancy is measured from the first day of last period. At the moment of fertilization, if periods were regular and about 28 days apart, the women is said to be two weeks of pregnancy. So the date when most women might notice their period hasn’t started, she is already 4 weeks pregnant. So 4 weeks after conception, the mother is six weeks pregnant. I wish you had explained this to your audience.
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