快猫短视频

FAR from being harmful, having sex while undergoing IVF may actually increase
a woman鈥檚 chances of getting pregnant.

During orgasm the uterus contracts, so sex could in theory dislodge an
implanted embryo. There is also a risk of getting infections that could harm the
embryo. On the flip side, animal studies have shown that something in semen
actually encourages embryo development.

To find out whether or not intercourse is beneficial, Kelton Tremellen of
Adelaide University and his colleagues followed the fate of over a thousand
test-tube embryos transferred to women in Australia and Spain. Half the women
were asked to have sex in the days around the transfer, and half to abstain.

鈥淲e had a 50 per cent improvement in the number of embryos that successfully
implanted in those that had intercourse, mainly due to more twins and triplets,鈥�
says Tremellen.

Gab Kovacs of the Monash IVF clinic in Melbourne says the study is
interesting, but unlikely to change couples鈥� behaviour. 鈥淚n our experience,
women are reluctant to have intercourse after embryo transfer because of pain
and bleeding.鈥�

Sex may not be necessary to improve the successful implantation rate,
however. 鈥淚f we can determine what it is in semen that is having this beneficial
effect then hopefully we鈥檒l be able to transfer fewer embryos each cycle, and
achieve good pregnancy rates,鈥� says Tremellen.

It鈥檚 known that the mother鈥檚 immune system somehow learns to ignore the
developing embryo. Tremellen suspects that semen increases the chances of
embryos surviving because it helps to prevent the immune response.