When do eggs begin to form?

Whether the eggs are healthy is really important because it concerns the next generation of a family. However, modern women have very limited knowledge about eggs, and they don’t even know when they ovulate, which is a bit embarrassing. Especially for couples who want to get pregnant, they need to pay more attention to the woman's ovulation period so that they can get pregnant as soon as possible. Now let me explain to you, when exactly is the egg formed?

Oocyte formation time

The formation of eggs must first go through the shedding of the endometrium. The shedding of the endometrium is cyclical, once a month, and it 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 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.

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 egg formation cycle

Women release an egg every month. The mother cell is wrapped in the primordial follicle. Under the influence of sex hormones, only one primordial follicle matures every month, and the mature egg is then discharged from the ovary into the abdominal cavity. An egg can survive for about 48 hours after being released, waiting to meet and combine with sperm during these 48 hours. If the egg cannot meet the sperm to form a fertilized egg due to various reasons after being released, it will die naturally after 48-72 hours. If you miss the chance of fertilization this time, you will have to wait until another egg matures and is released one month later, and then repeat the same process.