In vitro fertilization is a Union of egg and sperm in a test tube, then implanted into the uterus of a female patient with infertility or surrogate mother. If pregnancy after this procedure, often there is a multiple pregnancy, since all fertilized and replanted the eggs survive and attach to the uterine walls. If the patient doctors removed unplanned embryos, however this is very dangerous for pregnancy and may lead to the death of the remaining fertilized eggs.
IVF is used if the specialists can not eliminate or cure the factor preventing successful conception, for example, when the pregnancy make it impossible to deleted fallopian tubes or irreversible violation of their patency. If there are not enough donor sperm, sperm for IVF are extracted through the puncture or lung surgery. When male infertility the sperm are not required to connect with the oocytes in a test tube – it is simply injected into the uterine cavity where the sperm are independently fulfill their purpose.
After placing the fertilized egg in the uterus, the woman is prescribed hormonal drugs which maintain the tone of the uterine mucous membrane and significantly increase the probability of successful carrying a child. So, to prepare the ovaries typically use subcutaneous injection "Decapeptyl" and "Diphereline" and premature ovulation at the final stage of prevent stimulation using intramuscular injections of "Cetrotide" and "Ogrecollada".
For the regulation of the maturation process of the follicle subcutaneously or intramuscularly applied "Puregon" and "Menopur" and to complete maturation of eggs prescribed "Prophase" and "Pregna". The preparations of the "main" and "cough medicine", is used to prepare the uterine lining for embryo transfer and apply after fertilization up to twelve-fourteen weeks of gestation when the formation of the placenta, which starts to produce its own necessary hormones (progesterone).