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3D animation of how IVF works

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the menstrual cycle of fertile women

usually lasts about a month during this

time and under the influence of the

body's own natural hormones a tiny sack

within the ovary containing an egg grows

to about the size of a grape at a point

midway in the cycle this egg is released

from the ovary and ovulation occurs

population is also regulated by hormones

the egg in which from this moment on is

ready for fertilization then passes into

the uterine tubes to await the arrival

of fertile sperm ovulation is a

naturally occurring event and the desire

to have children is a similarly natural

instinct but that instinct cannot always

be fulfilled the causes of unwanted

childlessness are numerous but so are

the means of treating them

the technique of in vitro fertilization

or IVF remove several eggs from the