Viability and Established Pregnancy
A related issue that comes up in this debate is how often fertilization leads to an established, viable pregnancy. Current research suggests that fertilized embryos naturally fail to implant some 30% to 70% of the time. Of those that do implant, about 25% suffer early pregnancy loss by the sixth week LMP (after the woman's Last Menstrual Period), and an additional 7% miscarry or are stillborn. As a result, even without the use of birth control, between 50% and 70% of zygotes never result in established pregnancies, much less birth.
Read more about this topic: Beginning Of Pregnancy Controversy
Famous quotes containing the words established and/or pregnancy:
“I’ve found that there are only two kinds that are any good: slang that has established itself in the language, and slang that you make up yourself. Everything else is apt to be passé before it gets into print.”
—Raymond Chandler (1888–1959)
“Her girlfriends asked that innocent,
“What? What appeals to you?”
when her pregnancy cravings appeared.
Her gaze merely fell
on her husband.”
—Hla Stavhana (c. 50 A.D.)