How long does it take for an egg to form?

The egg is one of the major factors in pregnancy, and its function is actually similar to that of sperm. But compared to sperm, eggs can be said to be very precious. After all, only one or a few eggs can be released each month, while hundreds of millions of sperm come out every time. So, from the perspective of female physiology, how is an egg formed? Is the formation of an egg the same as that of a sperm? How long does it take?

How long does the egg formation cycle take?

The shedding of the endometrium is cyclical, once a month, and is affected by the cyclical changes in ovarian endocrine secretions. Each time the endometrium is shed, the follicles in the ovaries begin to develop. Under the influence of the estrogen they secrete, the endometrium, including the epithelial cells, blood vessels and glands, begins to grow and thicken again. The endometrium at this time is called the proliferative phase. Around the middle of the menstrual cycle, to be exact 14 days before the next menstrual period. The follicle in the ovary ovulates (taking a 28-day cycle as an example, the ovulation day is the 14th day). After ovulation, the follicle forms a corpus luteum, which can secrete estrogen and progesterone. These hormones act on the endometrium, making it thicker, the blood vessels more curved and congested, and the glands thicker and expanded to secrete a lot of nutrients. The endometrium at this time is called the secretory phase.

These changes are mainly to provide the fertilized egg with the nutritional needs for development after it is implanted in the endometrium. If the egg released this month is not fertilized, the corpus luteum in the ovary will degenerate, the production of estrogen and progesterone will decrease, the endometrium will not receive the support of estrogen and progesterone, and it will atrophy and collapse. The blood vessels in the endometrium will spasm and contract, and finally rupture and bleed. The endometrial layer will peel off from the uterine cavity and be discharged through the vagina. This is menstruation. In women of childbearing age, this change repeats itself unless they become pregnant, so it is called the menstrual cycle. It can also be understood that menstruation is a manifestation of failure of fertilization after ovulation once a month.

The process of fertilized egg implantation

First day of pregnancy: The penis is ejaculated into the posterior fornix of the vagina. Most of the sperm die in the acidic environment of the vagina. Only a small number of sperm pass through the cervix and reach the uterine cavity within 1 hour. After another 1 to 2 hours, the sperm has traveled a total of 450px and finally reaches the ampulla of the fallopian tube and combines with the egg to form a fertilized egg. A new life begins here, and in the next 266 days, the baby will develop in your uterus.

Day 2 of pregnancy: The first cell division will occur today and your baby will develop safely.

Day 3 of pregnancy: The fertilized egg undergoes 3 to 4 divisions. At this time, cell division and growth depend on the nutrition within the egg.

As the fertilized egg divides, it gradually moves toward the uterus due to the movement of the cilia and muscles of the fallopian tube. It reaches the uterine cavity 4 to 5 days after fertilization and then stays in the cavity for 3 to 4 days.

Day 5 of pregnancy: Today the fertilized egg undergoes important changes and is preparing to implant into the uterus.

Day 6 of pregnancy: The fertilized egg adheres to your uterine mucosa and prepares to implant.

Day seven of pregnancy: The fertilized egg adheres to your uterine mucosa and prepares to implant.

Day 8 of pregnancy: The implantation process begins. The embryo burrows into the uterine lining, so you may experience some light bleeding.

Day nine of pregnancy: The fertilized egg implantation process is completed today. The embryo is growing very quickly, but it is too early to confirm with a pregnancy test

Day 10 of pregnancy: The first part of your developing baby's body to function is his cardiovascular system. Your baby's heart starts beating a week before your period is delayed.

Day 11 of pregnancy: The placenta begins to form at the site of the fertilized egg implantation, and blood from your circulatory system begins to circulate in the placenta.