The luteinizing hormone receptor (LHR) plays an essential role as a mediator of LH and CG
action during embryonic sexual differentiation and in gametogenesis. In a hypogonadal …

Spermatogenesis is a complex process by which spermatogonia undergo differentiation,
becoming spermatocytes, which, after undergoing meiosis, originate haploid spermatids and …

In mice the chemokine Cxcl12 and its receptor Cxcr4 participate in maintenance of the
spermatogonial population during postnatal development. More complexity arises since Cxcl12 …

Chorionic gonadotropin (CG) is an essential signal in establishment and maintenance of
pregnancy in humans and higher primates. A G-to-A transition in exon 3 of human CGβ gene 5, …

Cell differentiation processes are highly dependent on cell stage-specific gene expression,
including timely production of alternatively spliced transcripts. One of the most …

The family of WWC proteins is known to regulate cell proliferation and organ growth control
via the Hippo signaling pathway. As WWC proteins share a similar domain structure and a …

Dear Sir, We were interested to read the paper by Arici et al.(1997) who found leukaemia
inhibitory factor (LIF) expression in human follicular fluid (hFF). We would like to confirm this …

objective Transdermal testosterone gel treatment is an effective androgen substitution
therapy with several advantages over conventional substitution therapies. Whereas side‐effects …

… We are grateful to Karin Brunswicker and Nicole Terwort for technical assistance. The
study was in part supported by the German Federal Health Ministry, Bonn and the Deutsche …

Introduction In healthy men, body weight and total fat content increase with advancing age,
while serum testosterone levels decrease. In order to elucidate whether a causal relationship …