The endometrial nucleolar channel system as an indicator of progestin potency in HRT.
A quantitative assessment has been made of nucleolar channel systems (NCS) in the endometrial glands of postmenopausal women receiving hormone replacement therapy. The women were taking conjugated equine oestrogen and one of five progestins. The number of NCS induced was related to the dose of progestin administered. The minimum doses of progestin inducing a comparable response to premenopausal secretory phase endometria were found to be 1-2.5 mg norethindrone, 150 micrograms norgestrel and 20 mg dydrogesterone. Progesterone and medroxyprogesterone acetate were inadequate at the doses tested. The results show that the quantification of endometrial gland NCS would be a useful addition to the biochemical and morphological assessments made of any new progestin treatment.[1]References
- The endometrial nucleolar channel system as an indicator of progestin potency in HRT. Ryder, T.A., Mobberley, M.A., Whitehead, M.I. Maturitas. (1995) [Pubmed]
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