Single serum progesterone determinations were made in 79 apparently normal women with a regular menstrual cycle. A normal range (40 subjects) was derived from the concentrations in the follicular phase and used to define an "anovular" range for luteal phase values (nine out of 39 subjects). The remaining luteal phase values were used to construct an "ovular" range for the luteal phase and, with...

BACKGROUND The aim of this study was to evaluate whether characteristics of human ovulation correlate with age and pregnancy potential. METHODS Two groups of women with regular menstrual cycles were included (i.e. one fertile and one infertile group), which were divided into four age groups (< or =29, 30-34, 35-39, > or = 40 years). Monitoring included observations of follicular phase length,...

The effects of profound suppression of circulating luteinizing hormone (LH) during the follicular phase of in-vitro fertilization cycles were explored in normal women during treatment with a gonadotrophin-releasing hormone analogue and exogenous purified follicle stimulating hormone. Ovarian responses to treatment and the capacity of supernumerary embryos to undergo blastocyst formation were ex...

Yi, Fu-Xian, Ronald R. Magness, and Ian M. Bird. Simultaneous imaging of [Ca ]i and intracellular NO production in freshly isolated uterine artery endothelial cells: effects of ovarian cycle and pregnancy. Am J Physiol Regul Integr Comp Physiol 288: R140– R148, 2005. First published August 5, 2004; doi:10.1152/ajpregu. 00302.2004.—Pregnancy and the follicular phase of the ovarian cycle show ele...

Sir, We would like to thank Dr Manno for the comments regarding pre-ovulatory progesterone levels in our paper on controlled ovarian stimulation with hCG supplementation (Thuesen et al., 2012). Dr Manno concluded that our study was another study denying a prognostic value to pre-triggering P4 levels. We think that our study should not be used to clarify a possible role of elevated progesterone ...

BACKGROUND There is evidence that cyclooxygenase-2 (COX-2) inhibitors can prevent or delay follicular rupture. COX-2 inhibitors, such as meloxicam, may offer advantages over emergency contraception with levonorgestrel, such as extending the therapeutic window for up to 24 h. We assessed the effect of meloxicam administered in the late follicular phase upon ovulation in women. MATERIALS AND ME...

Nevo O, Soustiel JF, Thaler I. Cerebral blood flow is increased during controlled ovarian stimulation. Am J Physiol Heart Circ Physiol 294: H3265–H3269, 2007. First published October 26, 2007; doi:10.1152/ajpheart.00633.2007.—Estrogen appears to enhance cerebral blood flow (CBF). An association between CBF and physiologically altered hormonal levels due to menstrual cycle, menopause, or exogeno...

Estrogen appears to enhance cerebral blood flow (CBF). An association between CBF and physiologically altered hormonal levels due to menstrual cycle, menopause, or exogenous manipulations such as ovariectomy or hormone replacement therapy has been demonstrated. The purpose of this study was to determine the association between ovarian stimulation and CBF in vivo by measuring blood flow in the i...

leptin, a circulating 16-kd polypeptide consisting of 167 amino acids, appears to be involved in the body weight homeostasis. moreover leptin plays an important role for the reproductive system, early embryogenesis, and fat metabolism during pregnancy and puberty. significant correlations have been found between leptin and sexual hormones, which is a cytokine and has hormonal properties. the ai...