Although modern medical standards have significantly advanced compared to the past, unexpected factors still place expectant mothers at risk. This is especially true for older mothers, as increasing age correlates with heightened pregnancy risks.
Age-related physiological factors expose older mothers to the following risks:
Increased risk of miscarriage
As women age, their reproductive capacity declines annually, and immunity weakens, leading to a marked increase in miscarriage rates among older pregnant women.Over a lifetime, a woman typically releases over 300 mature eggs. As she ages, harmful factors affecting ovarian function—such as radiation exposure, pathogenic infections, and inflammation—accumulate. These factors directly impair ovarian function, leading to a gradual decline in egg quality. Deteriorating egg quality reduces the viability of fertilized eggs, increasing the risk of miscarriage.With advancing age, gynecological disorders also become more prevalent. Beyond uterine inflammation, the increased age of older pregnant women makes genetic material more susceptible to mutations or abnormalities, further contributing to their higher miscarriage risk. Increased Risk of Pregnancy Complications Older mothers may also face pregnancy-related complications, with higher chances of developing pregnancy-induced hypertension and gestational diabetes compared to younger mothers.Additionally, older mothers are more susceptible to internal medical complications during pregnancy, such as hypertension, heart disease, kidney disease, or diabetes. Due to their age, many older mothers may have mild diabetes or hypertension that goes unnoticed. Once pregnant, changes in bodily functions and hormone levels can trigger these latent conditions, not only affecting fetal development but also posing life-threatening risks to the mother.
Difficulty Conceiving
Both men and women experience a gradual decline in reproductive capacity with age. The optimal childbearing age for women is between 25 and 30. Pregnancy after age 35, considered advanced maternal age, is associated with varying degrees of physiological decline (such as reduced ovarian function and lower estrogen levels), leading to a significant decrease in conception rates.Older women are prone to psychological distress such as fear, tension, anxiety, pessimism, shyness, and depression. These negative emotions can disrupt ovarian endocrine function, leading to irregular ovulation or even anovulation, resulting in menstrual irregularities or amenorrhea.
Increased risk of birth defects and Down syndrome
While every woman is born with a finite number of eggs, these eggs are continuously exposed to environmental pollution and influences from birth. Therefore, the later the age of childbirth, the greater the exposure to environmental factors and pollution, leading to a decline in egg quality. This increases the likelihood of chromosomal abnormalities in the eggs, potentially resulting in birth defects. This represents the greatest risk faced by older mothers.The incidence of Down syndrome in fetuses increases exponentially with maternal age. While the rate is approximately 0.11% for women aged 25 to 29, it rises to 0.26% for those aged 30 to 35 and further increases to 0.56% for women aged 36 to 40.
Increased Risk of Difficult Labor and Hemorrhage
As women age, the birth canal, perineum, and pelvic joints become stiffer and less elastic. Uterine contractility and vaginal extensibility also decline. Some older mothers experience slow cervical dilation during labor, or even failure to dilate, leading to prolonged delivery. This increases the likelihood of hemorrhage and obstructed labor. Consequently, older mothers have a higher cesarean section rate than younger women.
Increased Breast Cancer Risk
Advanced maternal age may also elevate cancer risk. Recent epidemiological studies indicate that women giving birth for the first time after age 35 exhibit significantly higher breast cancer incidence compared to those who first gave birth before age 30. The older the age at first birth, the greater the breast cancer risk.
Increased Risk of Depression
Statistics from the Chinese Medical Association's Perinatal Society, an authoritative medical research body, indicate that among 9,000 pregnant women tested, 15% experienced prenatal depression, with an annual increase of 9%. Older pregnant women lacking self-confidence are particularly susceptible to perinatal depression.Symptoms manifest as persistent low mood, anxiety, irritability, guilt, mental fog, and disorganized thinking. Suicidal tendencies represent the most severe manifestation of prenatal depression.
Hindered Postpartum Recovery
With age, bodily functions recover more slowly than in women under 30. Areas of particular concern for women—such as figure and skin—also show slower recovery compared to younger mothers.