On the issue of fertility, the focus of scientists is heredity. The research results of French geneticist Maurice show that the offspring born to men aged 30-35 are the best. Male sperm quality reaches its peak at the age of 30, and then it can last for 5 years.
The best reproductive age for women: 23-30 years old.
Women aged 23-30 are the best age to give birth. During this period, the overall development of women is fully mature and the quality of eggs is high. If pregnant, the risk of delivery is small, the fetus grows well, and the incidence of premature delivery, deformed children and dementia children is the lowest.
Couples of this age are experienced, energetic and capable of raising babies. If a woman is pregnant and gives birth prematurely, the fetus and the developing mother will compete for nutrition, which is not good for the health of the mother and the development of the fetus.
Best birth combination: Men are about 7 years older than women.
It is not difficult to see that the best age combination for male and female children should be that the former is about 7 years older than the latter. My father is old and relatively mature in intelligence, passing more "passwords" to the next generation; Young mothers and vigorous vitality will create a better environment for the fetus, which is conducive to the development and growth of the fetus, so the offspring born from this "optimal combination" are easy to come out.