What is meant by IVF treatment
IVF / ICSI in the natural cycle
In the Proliferation phase In the ovaries, the follicle-stimulating hormone (FSH) from the pituitary gland causes a so-called leading follicle with an egg cell contained in it to mature. At the same time, the uterine lining is rebuilt by the hormone estrogen and the uterine canal increasingly opens as ovulation approaches. When the follicle and the egg in it have reached optimal maturity, ovulation is triggered by the ovulation-inducing hormone (LH) from the pituitary gland. The egg cell is then transported into the uterus via the fallopian tube on the same side. Due to the previous opening of the uterine canal, sperm can enter the fallopian tubes via the uterine cavity and fertilize the egg cell. The egg cell can be fertilized for about 12-24 hours. The sperm themselves can survive for about 2 days, in extreme cases 5-7 days.
In the Secretion phase arises from the former follicle of the corpus luteum, which is responsible for the production of the corpus luteum hormone (progesterone). Progesterone plays an essential role in the remodeling of the uterine lining. The optimal conditions for receiving the fertilized egg are now created in the lining of the uterus. At the end of the secretion phase, the corpuscles and the hormone progesterone regress if there has been no implantation. In the following menstrual phase, the uterine lining is shed. In the event of implantation, the so-called trophoblast cells, from which the placenta later develops, produce the pregnancy hormone (hCG), which stimulates the corpus luteum to produce further progesterone. In this case there will be no menstrual bleeding (amenorrhea).
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