If embryos fail to implant three or more times than we use the term RIF.
Common causes for RIF are:
Low quality of egg or sperm.
From nearly age of 35, egg quality starts declining.
Chromosomal abnormality in the embryo.
The environmental conditions of the uterus may be unfavorable like inflammation,
scarring, fibroids, polyps, adenomyosis, endometriosis, etc.
Lifestyle and addiction.
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