TriploidyPolyploidyHydatidiform MoleTrisomyDiploidyChromosome DisordersEquisetumChromosome AberrationsZygoteFetal DiseasesAbortion, SpontaneousChromosomes, Human, Pair 13PloidiesKaryotypingPregnancyChromosomes, Human, Pair 18Uterine NeoplasmsUltrasonography, PrenatalPrenatal DiagnosisDown SyndromePregnancy Trimester, FirstAneuploidyGestational AgeSpermatozoaMicrosatellite Repeats