What is the difference between the natural pregnancy rate and the success rate of elderly childbearing?
With the development of society and the improvement of living standards, more and more women choose to postpone pregnancy, but the following problem is the difficulty of giving birth at an advanced age. Compared with young women, there are obvious differences in the natural pregnancy rate and the success rate of elderly childbearing. This article will elaborate on the differences between the natural pregnancy rate and the success rate of elderly childbearing from four aspects: physiology, ovarian reserve, pregnancy environment and pregnancy risk.
physiology
With the growth of age, the number and quality of eggs in women gradually decrease, and the irregular menstrual cycle, lack of menstruation and other problems also increase. These physiological changes have a negative impact on women's natural pregnancy rate. A study found that 35 year old women have only a 20% chance of natural pregnancy every month, and only 5% at the age of 40, making it difficult for older women to conceive naturally.
In addition, the eggs of elderly women have a higher risk of chromosomal abnormalities. The eggs with abnormal chromosomes cannot be fertilized and implanted normally, which increases the risk of miscarriage and abnormal development. Therefore, physiological factors have led to a significant decline in the natural pregnancy rate of older women.
Ovarian reserve
Ovarian reserve is one of the important indicators to evaluate female fertility potential. The increase of age will cause the decrease of ovarian reserve, thus affecting the ability to conceive. Ovarian reserve was mainly assessed by serum anti aminofluorescein (AMH) and basal follicle stimulating hormone (FSH).
Research shows that with the increase of age, the number of female follicles gradually decreases, the level of AMH decreases, and the level of FSH increases. This means that the ovarian reserve of elderly women is low and the quality of eggs is poor, which leads to the decline of natural pregnancy rate and success rate.
Pregnancy environment
The intrauterine environment of elderly women is also affected by the natural pregnancy rate and success rate. With the increase of age, the thickness and blood flow of endometrium decrease, which weakens the conditions for the implantation of fertilized eggs. In addition, the change of cervical mucus will also affect sperm movement and fertilization process.
These factors lead to the pregnancy environment of elderly women is not conducive to fertilization and implantation, further reducing the chance of natural pregnancy. Therefore, even if older women successfully conceive, the risk of pregnancy is relatively high.
Pregnancy risk
Older women face more pregnancy risks, which is one of the reasons for the lower natural pregnancy rate and success rate of older children. Research shows that the abortion rate and premature birth rate of elderly women are significantly increased, and the risk of fetal malformation is also relatively increased.
In addition, older women are more likely to suffer from pregnancy complications such as gestational diabetes, hypertension and pre eclampsia. These pregnancy risks will increase the adverse effects on maternal and fetal health, further reducing the chances of successful childbirth for older women.
Summary
Compared with young women, there are obvious differences in the natural pregnancy rate and the success rate of elderly childbearing. Physiological factors have led to a significant decline in the natural pregnancy rate of elderly women. The reduction of ovarian reserve and the deterioration of the pregnancy environment have further reduced the ability of elderly women to conceive. In addition, older women face more pregnancy risks, which further reduces the chance of successful childbirth. Therefore, for women who plan to give birth at an advanced age, early consultation with professional doctors and understanding of assisted reproductive technology and other options can improve the chances of successful pregnancy.
