The risk of having a baby suffering from trisomy 21 is 1 in 100 at the age of 40 (compared with 1 in 2,000 at the age of 25).
The vast majority of these pregnancies evolve quite naturally when monitored adequately. The first quarter is critical, because during most of the time, most automatic miscarriages happen. Their frequency exceeds 20% for women 40 years (compared with about 10% at the age of 25). The causes are mostly chromosomal.
The most common complication of end of pregnancy is gestational diabetes, particularly in overweight women. Insulin, the hormone that allows sugar to penetrate into the cells of the body, is no longer able to function normally. The sugar is therefore circulating at high blood levels, and the baby grows too much. When the doctor diagnoses diabetes, de/she gives a severe diet to the pregnant woman and, if necessary, medications.
As for preeclampsia (checked during a monthly visit to the doctor) at the age of 40, it’s two to three times more common. Preeclampsia may be associated with the presence of proteins in the urine. Sometimes these symptoms are accompanied by a delay in fetal development. These pathologies may lead the doctor to a decision on premature labor.
Cesarean section is more common after the age of 40.
Post-partum hemorragy is also more common after the age of 40.