Why do we calculate the length of a pregnancy from the first day of a women’s last period? 1.31K viewsJanuary 1, 2024 Question99.00K April 15, 2023 0 Comments Why do we calculate the length of a pregnancy from the first day of a women’s last period? In: 3216 69 Answers ActiveNewestOldest Anonymous Posted April 15, 2023 0 Comments It’s the only thing that we’ve been able to know with some degree of accuracy. Ovulation timeframes vary and sperm can live for days making the date of fertilization and implantation uncertain. You are viewing 1 out of 69 answers, click here to view all answers. Register or Login
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