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Table 1 Distributions of total choline-containing compounds (tCho), estradiol, progesterone, follicle stimulating hormone (FSH), luteinising hormone (LH), and prolactin in the group of women not using oral contraceptive (nOC) and in the group of women using oral contraceptive (OC)

From: Changes in total choline concentration in the breast of healthy fertile young women in relation to menstrual cycle or use of oral contraceptives: a 3-T 1H-MRS study

  OC group nOC group
Day 7 Day 14 Day 21 p value*
tCho (mM) 0.7 (0.2–1.7) 0.8 (0.3–2.4) 0.9 (0.4–1.2) 0.4 (0.2–0.8) 0.963
Estradiol (pg/mL) 30 (26–42) 74 (55–112) 136 (91–188) 152 (129–196) 0.024
Progesterone (ng/mL) 0.8 (0.5–1.0) 0.5 (0.4–0.8) 1.1 (0.7–2.1) 10.3 (1.6–16.3) < 0.001
LH (mIU/mL) 0.8 (0.3–1.7) 2.2 (2.1–3.1) 4.7 (3.3–10.0) 1.9 (0.8–5.1) 0.006
FSH (mIU/mL) 2.4 (0.9–4.2) 5.7 (4.9–8.1) 7.5 (5.5–11.0) 3.6 (2.3–5.2) 0.002
Prolactin (ng/mL) 16.7 (14.1–22.3) 14.8 (14.0–17.5) 16.5 (13.2–20.0) 14.8 (12.6–18.1) 0.541
  1. Data are medians and interquartile intervals. In the nOC group, three measurements were made on days 7, 14, and 21 of the menstrual cycle
  2. *This comparison was made among the three distributions measured in the nOC group as a variation during the menstrual cycle