Abortion, IncompleteDilatation and CurettagePregnancy Trimester, FirstPregnancyAbortion, SpontaneousAbortion, HabitualPregnancy Trimester, ThirdPregnancy Trimester, SecondPregnancy TrimestersAbortion, ThreatenedPregnancy OutcomePregnancy ComplicationsAbortion, MissedUltrasonography, PrenatalGestational Age