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A protein called early pregnancy factor (EPF) is detectable in a woman's blood within 48 hours of ovulation if fertilization has occurred. However, testing for EPF is time-consuming and expensive; most early pregnancy tests detect human chorionic gonadotropin (hCG), a hormone that is not secreted until after implantation. Defining pregnancy as ...
A woman's fertility is in generally good quality from the late teens to early thirties, although it declines gradually over time. [1] Around 35, fertility is noted to decline at a more rapid rate. [1] At age 45, a woman starting to try to conceive will have no live birth in 50–80 percent of cases. [2]
This is considered the end of the fertile phase of a woman's life. The predicted effect of age on female fertility in women trying to get pregnant, without using fertility drugs or in vitro fertilization: [38] At age 30 75% will conceive ending in a live birth within one year; 91% will conceive ending in a live birth within four years. At age 35
Waiting time to conception, or the time it takes for the woman to become pregnant, including the time for sperm to travel to the egg and form a zygote; Time added by fetal loss, also called postpartum infecundability, which is the amount of time necessary after a fetal loss for the womb to recover and be able to become fertile again
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The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus. The germinal stage takes around 10 days. [1] During this stage, the zygote divides in a process called cleavage. A blastocyst is then formed and implants in the uterus.
This process is called childbirth. The ova, which are the female sex cells, are much larger than the spermatozoon and are normally formed within the ovaries of the female fetus before birth. They are mostly fixed in location within the ovary until their transit to the uterus, and contain nutrients for the later zygote and embryo .
A female is most fertile within 24 hours of ovulation. Male fertility peaks usually in young adulthood and declines after age 40. [10] The time needed to pass (during which the couple tries to conceive) for that couple to be diagnosed with infertility differs between different organizations.