Reproduction. Role of hormones in the menstrual cycle, including FSH (follicule stimulating hormone), LH (luteinizing hormone), estrogen and progesterone. GnRH. Changes in hormone levels in menstrual cycle
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Role of hormones in the menstrual cycle, including FSH (follicule stimulating hormone), LH (luteinizing hormone), estrogen and progesterone.
Relationship between changes in hormone levels and ovulation, menstruation and thickening of the endometrium.
IVF in vitro. The egg and sperm cells meet outside the female´s body. The first test tube baby was born in 1978.
IVF is used for woman who have blocked fallopian tubes, usually due to an earlier infection, or who cannot sustain a pregnancy.
Depending on the reason:
Donoreggs. (thewomanistreatedwith hormones tohave more folliclesripen. A needleis placed in thefollicle and theeggis removed. (repeated)
Eggscells of thewomanwhowantstogetpregnanat.
The eggs cells are then mixed with sperm cells. This can be supplied by the woman´s husband or a sperm donor (if he is not fertile)
The fertilised egg cells are cultivated and either placed inside the uterus or frozen so that they can be used later.
The number of embryos placed in the uterus depends on several factors and policies about this depend on the country and even the opinion of the doctor involved.
If all embryos were implant successfully,
it ends in a multiple pregnancy ,
a premature delivery and
a reduced chance of survival for the babies.