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. 2021 Mar 19;12:636038. doi: 10.3389/fendo.2021.636038

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Copyright © 2021 Dias and Ulloa-Aguirre

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Concentrations of FSH and LH in serum samples from 78 women with a normal menstrual cycle. The day of the menstrual cycle is given and the first day indicated by a vertical hatched bar. The ovarian cycle starts on day 25 of the previous cycle and lasts to day 24 of the menstrual cycle, the end indicated by a vertical dashed line. (B, C) Concentrations of FSH-tri and FSH-tetra (B), and their estimated biopotencies (C), in arbitrary units per L, during the normal menstrual cycle. Data in this figure are plotted as three-day moving mean values. Reproduced from (86) with permission.