What are the causes of infertility in both genders?

What are the causes of infertility in both genders?

STD's, surgical and genetic causesThe stress of having and raising children can often put a strain on the libido.

It's also like the saying that insanity is hereditary. Parents get it from their children.IVF fertilization is discouraged by Vatican, but we can try to explain causes of infertility.

Females are born with all their egg cells in ovaries. Any STD can damage those. Sex during menstrual phase is not only forbidden by Conservative Judaism and Islam, it can also drastically increase likelihood of contraction of STDs and even spread AIDS (which IS transmitted with sperm and with blood, even with so small amount as leftover on heroin needle, let alone full menstrual bleeding or full ejaculation discharge).

Natural radioactivity and Strontium in atmosphere since Nevada nuke tests might contribute to female infertility, as egg cells in ovaries degrade faster, so increased age of birth of a child means increased risk of DNA damage and genetic defects (yet RNA deposit can make children of old age wiser).

With males it is not so simple. Males have all their little swimmers in puberty, but at age of 30 there is already 10% of them that cannot swim because of having two tails or no tail, or similar malformation seen on TV. This is a good thing that male seed cells with DNA damage cannot swim so heavy walks of life up to uterus, which means life depends on swimming against current.

IVF doesn't regard this. Contrary to what you might expect, that science would rid male seed of deranged cells and genes, it introduces fertilization by a sperm that, because of DNA damage, would not have natural capacity to swim upwards to Fallopian tube or uterus and fertilize egg by breaking it's envelope, after which it immediately changes allowing no further seed cells to bypass cell walls.

IVF "helps" nature by opening by needle point a hole in female egg cell so sperm cell chosen by scientists could fertilize it, for it was too week construction to do it by itself. After several generations of this, male sperm cells would become too weak for most people to fertilize any woman without IVF assistance, as genes creating weak sperms (and these are most likely damaged) would propagate.drinking too much alcohol
overweight
too little sperm
PCOS for women
STD's

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