Search results for "Free βhcg"

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Additive effect of factors related to assisted conception on the reduction of maternal serum pregnancy-associated plasma protein A concentrations and…

2013

Objective To analyze whether assisted conceptions need adjustments in first-trimester Down syndrome screening and why modifications in screening markers occur. Design Eleven-year cohort retrospective analysis. Setting Maternal-fetal medicine unit. Patient(s) Two thousand eleven naturally conceived normal singleton pregnancies and 2,042 normal singleton pregnancies achieved with assisted conception: 350 by IUI and 1,692 with IVF (n = 328) or intracytoplasmic sperm injection (ICSI; n=1,364), using nondonor (n = 1,086) or donated ova (n = 606), with fresh (n = 1,432) or frozen (n = 260) embryos. Intervention(s) Comparison of ultrasound and biochemical markers of first-trimester Down syndrome s…

medicine.medical_specialtyPregnancy-associated plasma protein AReproductive Techniques Assistedmedicine.medical_treatmentDown-RegulationFertilization in VitroIntracytoplasmic sperm injectionEmbryo cryopreservationPredictive Value of TestsPregnancyPrenatal DiagnosismedicineHumansPregnancy-Associated Plasma Protein-AChorionic Gonadotropin beta Subunit HumanFalse Positive Reactionsreproductive and urinary physiologyInsemination ArtificialRetrospective StudiesGynecologyDown syndrome screeningAnalysis of VarianceChi-Square DistributionOocyte Donationbusiness.industrySingletonFree βhcgObstetrics and GynecologyPregnancy Trimester FirstReproductive MedicineCohortFemaleHormone therapyDown SyndromebusinessNuchal Translucency MeasurementBiomarkersFertility and sterility
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