The age range of 20 to 34 is considered the "golden age" for pregnancy, according to health experts. After the age of 35, women's fertility and the quality of their pregnancies begin to change unfavorably. Dr. Nguyen Thi Sim, former Deputy Director of the Prenatal Screening and Diagnosis Center at Hanoi Obstetrics and Gynecology Hospital, emphasizes that age is one of the most significant factors affecting women's reproductive capabilities.

Many modern women choose to delay childbirth to focus on education, career development, or financial stability. However, Dr. Sim warns that the biological clock of the ovaries does not wait for individual plans. Research indicates that women aged 20-24 have the best chances for conception due to optimal egg quality and quantity. Meanwhile, women aged 25-29 maintain good fertility and often have more stable psychological and economic conditions for post-birth care.

For those prioritizing career development, planning for childbirth between the ages of 30 and 35 is still considered appropriate, as long as reproductive health is monitored regularly. Dr. Sim notes that age 35 marks a crucial turning point in female reproductive health. After this age, ovarian reserve decreases more rapidly, and egg quality declines, significantly reducing the chances of natural conception.

Statistics show that about 80% of couples can conceive after six months of regular unprotected intercourse. However, for women over 40, this probability drops to about half compared to those in their 20s. Therefore, Dr. Sim advises women under 35 to seek fertility assessments if they have not conceived after one year of trying, while women aged 35 and older should consult specialists after six months of trying.

Moreover, pregnancy after age 35 carries increased risks, including preeclampsia, miscarriage, stillbirth, ectopic pregnancy, and premature birth. Alarmingly, the older the mother, the higher the risk of chromosomal abnormalities in the fetus. Dr. Sim explains that approximately 50% of embryos may exhibit chromosomal disorders, and this rate increases with maternal age, raising the risk of genetic syndromes such as Down syndrome and Edwards syndrome, as well as affecting the child's neurological and motor development.

A study highlights that the risk of having a child with Down syndrome increases significantly with maternal age. At age 25, the probability is about 1 in 1,250, while at age 30 it is 1 in 952, at 35 it rises to 1 in 378, and at over 45, it is approximately 1 in 30.

While delaying childbirth does not guarantee difficulties, women must understand the changes their bodies undergo over time to proactively build suitable reproductive plans. Regular prenatal check-ups and screenings can enhance the chances of welcoming a healthy baby.