Abstract Background More than 67% of all embryos transferred in the United States involve frozen-thawed embryos. Progesterone supplementation is necessary medicated cycles to luteinize endometrium and prepare it for implantation, but little data available show if this beneficial true natural cycles. We evaluated use luteal phase progesterone cryopreserved/warmed blastocyst transfers not using a...

The etiology of developmental dysplasia of the hip (DDH) is unknown. There are many insights, however, from epidemiologic/demographic information. A systematic medical literature review regarding DDH was performed. There is a predominance of left-sided (64.0%) and unilateral disease (63.4%). The incidence per 1000 live births ranges from 0.06 in Africans in Africa to 76.1 in Native Americans. T...

Intrauterine growth restriction (IUGR) from uteroplacental dysfunction causes impaired nephrogenesis and ultimately hypertension, but it is unknown whether IUGR caused by insufficient space for placental development seen in uterine anomalies and/or multifetal gestation exerts the same effects. Fetal renal development and metabolism were studied in an ovine space-restriction model by combining u...

S chaaf and colleagues 1 have confirmed an increased risk of preterm birth in singleton pregnancies among women with a history of preterm birth in a twin pregnancy. Their comprehensive evaluation of a large dataset should settle the uncertainty that has attended previous smaller studies. 2-6 The risk is real, so now the question is, Why? Why do women who deliver twins preterm more often deliver...

OBJECTIVE Oxytocin is one of the most frequently used drugs in labour and there are many different dosage regimens. The aim of this study was to examine the use of oxytocin by obstetricians in South Africa. METHODS A specially designed questionnaire was drawn up and distributed to specialists according to an address list obtained from the South African Society of Obstetricians and Gynaecologi...

In the United States, the annual rate of preterm births (before 37 weeks of gestation) reached a peak of 12.8% in 2006 and was 11.7% in 2011.1 The rate in the United States remains nearly twice the rate in European nations.2 Premature birth in the United States accounts for 35% of deaths in the first year of life3,4 and estimated annual costs exceeding $26 billion.5 Rates of death in the first ...

BACKGROUND During pregnancy, the hyperdynamic physiology of circulation can exacerbate many cardiovascular disorders. Congestive heart failure (CHF) usually occurs during late pregnancy, which is significantly associated with a high level of maternal and neonatal morbidities and mortalities. The profile of women who develop peripartum CHF (PCHF) is unknown. We investigated the epidemiological p...