For women: This is the best age to have a baby according to science.

The biological window of opportunity for conception and the window of optimal health for children tend to coincide.

Babies born to mothers aged 18 to 19 are often healthy. Infants usually have a modest underweight trend but are generally healthy. The possible harm to the mother is the primary concern, as she is beginning to show signs of growth and development stunting at this age after having normally continued to develop a few neurological and musculoskeletal systems until age 22 or 23. Mothers who are physically mature and taller than their children have less of an issue with this. The possibility of difficulties for the mother also rises slightly but only marginally after this point.

Women between the ages of 20 and 26 are generally considered to be in the optimal window of time to have a family, as this is the age range associated with the healthiest newborns and the fewest potential complications for the mother.

Women's fertility begins to decline slightly between the ages of 27 and 29, despite the fact that this is still a relatively healthy time to have children.

Increases in the prevalence of neurological and learning impairments in youngsters, such as attention deficit hyperactivity disorder (ADHD), generalised anxiety disorder (GAD), and autism spectrum disorder (ASD), are first observed in those aged 30–35. There's a higher risk of difficulties for the mother's health, but it's not usually taken seriously. However, fertility declines by about 33% from the time they were in their twenties.

An uptick in premature births and the number of babies delivered with conditions including Down syndrome and autism is seen in women aged 36 to 39. Additionally, this may cause long-term issues with lung development, which may increase the child's risk for getting asthma. There is a moderately increased risk to the mother, although it is still within the'safe' range. Fertility rates are decreasing much further.

The fertility rate falls dramatically every year for people aged 40 and up. There is a much higher risk of having a child who is diagnosed with a major or chronic disease or condition. The mother's health may potentially be in jeopardy. After the age of 40, you should seriously consider the risks before deciding whether or not to have children at all. After 45, it is generally not recommended. 

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