[Frontiers in Bioscience 7, d1879-1898, September 1, 2002] 1879 BIOLOGY OF
PROGESTERONE ACTION DURING PREGNANCY RECOGNITION AND Page 1 [Frontiers in …

Placenta has a wide range of functions. Some are supported by novel genes that have
evolved following gene duplication events while others require acquisition of gene …

Ets is a family of transcription factors present in species ranging from sponges to human. All
family members contain an approximately 85 amino acid DNA binding domain, designated …

Trophoblast stem cells (TSC) are the precursors of the differentiated cells of the placenta. In
the mouse, TSC can be derived from outgrowths of either blastocyst polar trophectoderm …

The mechanisms responsible for prevention of corpus luteum regression during early
pregnancy are diverse and appear to have arisen in concert with the evolutionary …

Conventionally, in vitro–fertilized (IVF) bovine embryos are morphologically evaluated at the
time of embryo transfer to select those that are likely to establish a pregnancy. This method …

BACKGROUND The human placenta is vital for fetal development, yet little is understood
about how it forms successfully to ensure a healthy pregnancy or why this process is …

Interferon-τ is a major product of ovine and bovine conceptuses during the period before the
trophoblast makes firm attachment to the uterine wall and begins to form a placenta. Its …

Two-way communication between the conceptus and the mother during early pregnancy is
essential if the pregnancy is to survive. In this review, our primary focus is on biochemical …

Uterine-derived factors are essential for conceptus development and secretion of the
maternal recognition-of-pregnancy factor, interferon-τ (IFNT), in ruminant species. The …