Healthy women need to meet the following conditions to conceive:
(1) The ovaries release normal mature eggs every month. Women of childbearing age have two ovaries and release one egg every month. The egg is discharged into the pelvic cavity and is picked up by the fimbriae of the fallopian tube into the fallopian tube. For example, if the menstrual cycle is 28 days, the time of ovulation is about the 14th to 15th day of the menstrual cycle, that is, 14 days before the next menstrual period. The egg can survive for 16 to 24 hours after being released.
(2) The ovary can secrete hormones necessary to maintain the growth of egg cells and embryos. The development of eggs requires nutrition from estrogen secreted by the ovary. After ovulation, the corpus luteum formed by the ovary can secrete progesterone, which is crucial for the maintenance of early pregnancy.
(3) The semen must be normal. The number, motility and shape of sperm in semen must be normal. Other factors such as long liquefaction time, antibodies and white blood cells in semen are also factors that affect pregnancy. Sperm can survive for 48 hours after being discharged, so sexual intercourse should be scheduled before and after ovulation.
(4) The cervix is normal. Cervical mucus becomes clear during the ovulation period, and sperm can penetrate into the cervical mucus and be stored in the cervical canal. They are released in batches and swim into the uterine cavity. If the cervix is inflamed, the cervical mucus will be very sticky and it will be difficult for sperm to enter.
(5) The fallopian tube is unobstructed and functions normally, allowing sperm and egg to meet and fertilize in the tube, and transport the embryo to the uterine cavity. The fimbriae of the fallopian tube can collect eggs from the pelvic fluid. Sperm and eggs combine in the ampulla of the fallopian tube. The fertilized egg divides into multiple cells while traveling along the fallopian tube toward the uterine cavity. It enters the uterine cavity about 3 days later.
(6) The embryo can be implanted in the endometrium. The endometrium thickens after ovulation and changes during the secretory phase. The embryo implants into the endometrium 3 days after entering the uterine cavity, which is called implantation. At this time, whether the embryo can continue to develop and grow depends on the embryo\’s own ability to survive and the endometrial secretion of sufficient nutrients. If the endometrium is inflamed or damaged, the embryo cannot be implanted.
If there is any obstacle in any of the above links, infertility may occur. From this point of view, the causes of infertility can exist in both men and women at the same time, or in only the man or the woman.
This article is provided by Baidu Reading and is excerpted from \”Clearly \”Conception\”Plan\” Author: Sun Jianqiu and Xie Yingbiao