Weight and Age Factor
Women who are overweight will have greater hormone production in the body which will be a plus point if you are planning for twins.
But being overweight during or while planning pregnancy has its disadvantages as well.
Women who have a BMI that is above 30 have more chances of getting twin babies. Age too plays a great role in the conception of twins. Older women have better chances of conceiving twins. That’s why women who are above the age of 40 have a finer chance to conceive twins.
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Sperm Characteristics and Ovulation
While planning for twin girls, it is important to check the characteristics of female sperms. Female sperms are heavier, live longer and are slower and passive swimmers.
While male sperms swim faster and live only for 24 hrs, female sperms can live for 72 hours. So sexual union must be planned 2 to 3 days before ovulation.
This will make the female sperms wait for the egg to mature and fertilize the egg. In the meanwhile all the male sperms would have died and you will only get twin girls.
Female sperms are known to live longer in acidic environment. So having acidic food prior to ovulation will help in the body becoming acidic and reduce the mortality of male sperms, thereby producing female twins.