Pregnancy and birth after assisted reproduction

Autor:	Alfonso Gutiérrez Nájar, Maria Elena Gonzalez Panzzi, Marco Orbea Travez, Jaroslav Stern Colin y Nunes
Rok vydání:	2002
Předmět:	medicine.medical_specialty medicine.medical_treatment Abortion Intracytoplasmic sperm injection Miscarriage Ovarian Hyperstimulation Syndrome Reproductive Techniques Pregnancy Risk Factors Medicine Humans Fetal Death reproductive and urinary physiology Gynecology Fetus business.industry Obstetrics Blastocyst Transfer Parturition Obstetrics and Gynecology medicine.disease Pregnancy Reduction Multifetal Abortion Spontaneous Pregnancy Complications Quadruplets Pregnancy Trimester First Reproductive Medicine embryonic structures Gestation Female Pregnancy Multiple business Developmental Biology
Zdroj:	Reproductive biomedicine online. 5(1)
ISSN:	1472-6483
Popis:	Pregnancy and birth after IVF has attracted much critical attention. Overall, pregnancy rates are about 30-40% with three transferred embryos. Abortion rates are high before 19 weeks of gestation, at 8% of established pregnancies, and ectopic pregnancies are regular occurrences. Pregnancy rates are highest (35%) in women aged 20-24 years, declining to 10% at and above age 40. The use of intracytoplasmic sperm injection (ICSI) and blastocyst transfer has transformed the establishment of pregnancies for couples with differing indications. High rates of implantation are achieved with blastocyst transfers, although many embryos die in vitro before this stage. Twins and triplets can result in up to 50% of pregnancies. Heterotopic pregnancies are rare. Abortion afflicts fetuses before 12 weeks (vanishing fetuses). Rates of spontaneous abortion can be as high as 50% with quadruplets and quintuplets, and may be even higher in cases of fetal aneuploidy. At birth, prematurity is high, especially with twins or higher multiple pregnancies. Fetal reduction is used to reduce multiple pregnancies for singletons. Ovarian hyperstimulation is a risk associated with multiple pregnancy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa55a23d35d6358531e4d690e9fe0803 https://pubmed.ncbi.nlm.nih.gov/12470551 Zobrazit plný text záznamu Full Text from ScienceDirect Plný text ve formátu PDF Plný text ve formátu HTML
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