Why is it said that babies born after biochemical processes are better?

　　Biochemical pregnancy usually refers to an early pregnancy loss, where the embryo stops developing and is naturally absorbed before reaching a stage that can be clinically identified. Generally, there is no basis for the claim that "babies conceived after a biochemical pregnancy are better." However, biochemical pregnancy may have some positive impact on the health of the fetus in subsequent pregnancies. The detailed analysis is as follows:

　　Biochemical pregnancy may be related to abnormal hormone levels in women, especially progesterone and human chorionic gonadotropin (hCG). In normal early pregnancies, sufficient progesterone is required to maintain the stability of the endometrium and support embryonic development, while hCG functions to maintain corpus luteum activity during early pregnancy. Biochemical pregnancy might result from inadequate corpus luteum function or insufficient hCG secretion, which deprives the embryo of necessary growth support.

　　Early biochemical pregnancies may eliminate embryos with abnormal chromosomes or severe genetic defects, thereby reducing the likelihood of giving birth to unhealthy or defective babies and increasing the chances of conceiving a healthy, normally developing fetus.

　　Therefore, the notion that babies conceived after a biochemical pregnancy are "better" likely stems from the fact that women who have experienced biochemical pregnancy may have eliminated certain pathological factors, thus creating more favorable conditions for giving birth to a healthy baby. However, this does not imply that biochemical pregnancy itself has any positive significance.