WHAT CAUSES A BIOCHEMICAL PREGNANCY?

WHAT CAUSES A BIOCHEMICAL PREGNANCY?

WHAT CAUSES A BIOCHEMICAL PREGNANCY?

Several possible factors have been proposed, but unfortunately, the exact cause or relationship still remains unknown. Two of the most commonly attributable factors include:

Genetics:
It is becoming clearer that the genetic make-up of the woman’s egg is pivotal for normal embryo development. Two mechanisms for early embryo loss have been suggested. Firstly, the chromosomes carrying genetic material do not separate equally when cells are dividing. Secondly, for some reason, the early embryo may not have the ability and capability to continue developing and growing. In other words, abnormal genetic material may form in the egg or the sperm even before conception or after fertilization in the very first days of the embryo developing.

Endometrial thickness and pattern:
Biochemical pregnancies may be related to the thickness and pattern of the inside endometrial lining of the uterus. This has not been shown to be related to maternal age or previous miscarriage. Biochemical pregnancy and clinical spontaneous miscarriage are not related to hormone levels (estradiol or luteinizing hormone (LH)) on the day of hCG trigger with fertility treatments or LH surge. Thus, checking hormone levels before conception cannot predict which pregnancies will be healthy and which pregnancies will go on to miscarry.