negative urine pregnancy test, human chorionic gonadotropin (hcg), a hormone for maternal recognition of pregnancy

baby biology birth cells chorionic concept contraception diagnosis embryo examination family fertility gift gonadotropin growing gynecology hand hcg health hold hormone human icon identification infertility isometric lab maternal maternity medical medicinal menstruation method mother motherhood negative ovulation parent period planning positive pregnancy pregnant prenatal prepare produced recognition result scientific stick strip surrounding symbol syncytiotrophoblast test trophoblast urinalysis urine woman