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A Rise in the Biologically Active LH: Immunologically Active LH (B/I) Ratio during the Normal Luteal Phase
Author(s) -
Tennekoon Kamani H.,
Lenton Elizabeth A.
Publication year - 1989
Publication title -
asia‐oceania journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.597
H-Index - 50
eISSN - 1447-0756
pISSN - 0389-2328
DOI - 10.1111/j.1447-0756.1989.tb00192.x
Subject(s) - luteal phase , follicular phase , menstrual cycle , endocrinology , medicine , chemistry , luteinizing hormone , biology , hormone
Biologically active (bio) LH concentrations and immunologically active (immuno) LH concentrations were measured in integrated hourly blood samples collected over 24 h study periods ( n =27) and in 5 min blood samples collected over 2 h study periods ( n =21) during different stages of the menstrual cycle in a group of regularly cyclic women. Episodic fluctuations were seen in both the bio LH and immuno LH concentrations in hourly as well as in 5 min data series. However, there was no consistent correlation between episodes of bio LH and immuno LH. Mean B/I ratio over the 24 h study periods as well as over the 2 h study periods were significantly higher during the luteal phase than during either the follicular phase (p<0.002) or the mid cycle (p<0.02).