Scent of biological father plays an important role in attaining sexual maturity or puberty in girls. A study that studied about 1,983 girls found that the girls who were living with their biological fathers experienced sexual maturity somewhat later than the girls who were either not living with their biological father or were living with the fathers who were not actually their biological fathers.
This study also revealed that the girls who were living in urban areas, attained sexual maturity earlier than the girls who were living in rural areas.
In fact, this is an interesting research that may still be hiding various fact, I believe scientists should go deeper into this to know more deeply about it.
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Via: womenhealth