The best age to have a baby is between 25 and 30 years old from the perspective of eugenics, and it is not good to have a baby too early or too late. 25-30 years old is when a woman is more mature and her body is in a good condition to conceive. Also, at this age, the physiology is at a relatively high metabolic stage, which makes it relatively suitable for pregnancy. The quality of eggs at this stage is better and less prone to risks such as miscarriage and chromosomal abnormalities, so it is recommended that the best age for a woman to conceive is between 25-30 years old. If you are older than 35 years old, you are an older primiparous woman. Conception above 35 years old is prone to malformations and chromosomal abnormalities, so conception at 35 years old is not recommended. Conception is also not recommended if the age is too young and the organism aspect is not mature. Couples should keep a stable state of mind during pregnancy preparation and not be too anxious, as prolonged anxiety may affect women’s endocrine disorders, which is not conducive to successful conception.