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The Luteal Phase and Its Importance for Conception

The luteal phase is the time between the day after ovulation until menses. The also infamous two week wait! This is the time where you wait to be able to test and see if you’re pregnant. Here we give you the medical details of what takes place during those two weeks.

What happens during the luteal phase until conception?

If the egg is fertilized by sperm and doesn’t demise within the first day, then the subsequent embryo will take on average about five to six days to travel the fallopian tubes and arrive into the endometrium (Uterine Cavity). The large amounts of Estrogen that was made during the follicular phase created a lush environment for the embryo to thrive (see embryo development below). The large amounts of Progesterone that is now being created, is what keeps the endometrium stabilized and keeping it from shedding (what is called menses) along with helping with implantation. There has been a myth propagated about implantation spotting/cramping, but the medical community has not recognized that this is truly an actual event, as one must remember that an embryo is microscopic and that spotting can also be caused by a myriad of reasons.

It is the progesterone created during the luteal phase that will make your temperature rise. The temperature should be taken upon opening one’s eyes upon awakening. Many recommend having your temperature monitor on a nightstand near you. For a valid result, one should have gotten at least three hours of sleep. The corpus luteum, responsible for the luteal phase, only lives for fourteen days (+/-2 days) unless rescued by a pregnancy. If there is no pregnancy, then the demise of the corpus luteum is what causes the huge drop in Progesterone and Estrogen, which is what creates menses. If there is a pregnancy, then the pregnancy will keep the corpus luteum alive (via hCG) and producing Progesterone until the 10th wk of gestation, when the pregnancy itself will secrete its own Progesterone.

Good luck testing!

Originally published at FertilityTies

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