Does nuristerate have any impact on pregnancy when injected for the 1st then one have unprotected sexual intercourse within 14 days and becomes pregnant?

Nuristerate ?'s: Nuristerate is essentially to provide long acting progesterone release, which creates a barrier to implantation. Pregnancy is , however, possible, as the injection is not 100% preventative. Progesterone also interferes with ovulation, so testing for pregnancy based on "expected" onset of menses is not reliable. Obtain a serum HCG test in 10 days to confirm a pregnancy.