Interest in Infants:effects of puberty

Hinobayashi, Toshihiko; Kato-Shimizu, Mayuko; Onishi, Kyosuke; Kanazawa, Tadahiro; Akai, Seiki; Minami, Tōru

doi:10.4992/pacjpa.78.0_1ev-2-020

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“…There is concern regarding the effect of prolonged amenorrhea on fertility and childbirth. The mean age at menarche in this study was 13.3 ± 2.2 years, which is later than the mean age of 12.2 years, 19 and the proportion of primary amenorrhea was 3.9%. Di Cagno et al 20 have reported that heavy training before menarche delayed menarche by an average of 2 years in rhythmic gymnasts and that 50% of rhythmic gymnasts have amenorrhea.…”

Section: Discussioncontrasting

confidence: 56%

Menstrual Status and Pregnancy in Former Elite Long-Distance Runners With Menstrual Disorders

Fujita

Sasaki

Yoneda

et al. 2022

Clinical Journal of Sport Medicine

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Objective:To estimate the ratio of menstrual abnormalities, infertility, and other problems related to pregnancy and childbirth in former long-distance runners. We hypothesized that the female athlete triad during an athletic career affects future fertility and childbearing in former athletes.Design:Cross-sectional study.Setting:Participants of the All Japan University Women's Ekiden.Participants:Female former athletes who competed at national level were asked to complete the questionnaire; 137 valid responses were obtained.Independent Variables:Age at menarche and at the onset of pregnancy, history of amenorrhea and gynecological disorders, and lowest body mass index (BMI) during their athletic career.Main Outcome Measures:Menstrual status, history of pregnancy and childbirth, any related infertility treatment and problems, and history of stress fractures.Results:The mean age at menarche was 13.3 ± 2.2 (range, 10-25) years. Five athletes (3.6%) had primary amenorrhea. Eleven of the 137 participants (8.0%) required treatment for infertility. Sixty participants had 121 pregnancies, of which 5 were yet to deliver during the survey. Fifteen of 116 pregnancies (12.9%) ended in miscarriage, induced abortion, or stillbirth. Logistic regression analysis showed that the factors related to “infertility treatment” were age at the onset of pregnancy (P = 0.047) and higher BMI during their athletic career (P = 0.032; odds ratio, 2.19).Conclusions:The main factor influencing infertility was an older age at the time of pregnancy, similar to that observed in the general population. Amenorrhea or being underweight during their athletic career was not associated with problems related to conception and childbirth.

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Section: Discussioncontrasting

confidence: 56%