]_Semen_How to enter
[How does sperm enter the fallopian tubes?
]_Semen_How to enter
Sperm is a germ cell in a man’s body. When a sperm meets an egg, it may form a fertilized egg and cause a woman to become pregnant.
Although most adults in life understand this truth, they still lack understanding of specific situations.
Few people know how a sperm enters the fallopian tube of a woman.
So how does sperm enter the fallopian tubes?
How the sperm enters the vagina during sexual intercourse. After semen is injected into the vagina, most of it accumulates in the posterior vaginal fornix. The cervix is just immersed in this semen pool.
Under normal circumstances, sperm can enter the cervical canal after a few minutes.
The normal vaginal environment is acidic. This environment has important physiological significance for the self-cleaning effect of the vagina, but it is not conducive to sperm motility and survival.
How sperm can change the sperm of cervical cancer can be broken down, which is closely related to the biochemical properties of cervical mucus. The secretion of cervical mucus is directly affected by the levels of estrogen and progesterone secreted by the ovaries.
In the early stage of ovulation, mature follicles secrete a large amount of estrogen, making cervical mucus thin, clear and transparent like egg white, and the amount also increases.
It contains nutrients such as sugar, microbiotin and salt to provide energy for sperm activity.
Cervical cancer has a screening effect on sperm fractures. Only those spermatozoa with normal morphology and high motility can pass through cervical cancer smoothly.
In addition, there is a substance in the seminal plasma that inhibits the activation of sperm and attaches to the sperm head. During the process of sperm passing through the cervical mucus, these substances can be removed to obtain fertilization ability. This process is called capacitation.
How does the sperm move in the uterine cavity? After the sperm enters the uterine cavity through the cervix, with the help of uterine fluids, it continues to move upstream. Generally, it does not stay in the uterus. The sperm passes through the uterine horn and reaches the fallopian tube isthmus.
Of course, sperm will pass through the fallopian tubes on both sides, unless the fallopian tubes are obstructed.
How sperm move through the fallopian tube through the fallopian tube. The sperm and the tubal fluid are connected to the fallopian tube mainly through the short and partial contraction of the fallopian tube muscle wall.
The fallopian tube epithelial cells have numerous cilia, and the cilia swing direction is from the umbrella end to the uterine cavity.
After the egg has emerged from the ruptured mature follicle, it is captured by the umbrella end of the fallopian tube.
The egg itself does not have the ability to move. Its movement depends on the contraction of the smooth muscles of the fallopian tubes and the cilia of the epithelium, and it passively moves towards the uterine cavity. Here it is fertilized in combination with the sperm upstream, and the fertilized egg moves passively into the uterine cavity.Implantation in the endometrium begins a new life.