Pregnancy TestsPregnancy Tests, ImmunologicPregnancyPregnancy, EctopicPregnancy OutcomeChorionic GonadotropinChorionic Gonadotropin, beta Subunit, HumanPregnancy RateFertilization in VitroPregnancy ComplicationsEmbryo TransferFalse Positive ReactionsPregnancy, AnimalSperm Injections, IntracytoplasmicReagent Kits, DiagnosticPregnancy Trimester, FirstPregnancy Trimester, ThirdNeural Tube DefectsNeural TubeAnencephaly