Longitudinal Study of Mother's Sleep/Wake Behaviors, Sleep State and Subjective Feelings of Fatigue from Late Pregnancy To Postpartum, Related Their Infant's wakefulness

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  • 乳児の覚醒行動からみた妊産褥婦の夜間覚醒と睡眠感・自覚症状に関する継続的研究
  • ニュウジノカクセイコウドウカラミタニンサンジョクフノヤカンカクセイトスイミンカン・ジカクショウジョウニカンスルケイゾクテキケンキュウ

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Abstract

Sleep logs were performed in order to investigate the changes in the mother's sleep-wake patterns and fatigue during the period from late pregnancy to postpartum and similarities between the wake behaviours of mothers and their infants during the nights Records of sleep and wakefulness were kept on 26 mothers from the 7th week before delivery to the 15th week in the postpartum and 12 infants during first 14 weeks of life. Data of 12 non-pregnant women with matching age and obstetric history were collected and used as a control. The data indicates that the Mother's wake after sleep onset (WASO) during nocturnal sleep periods were mostly spent caring for the infant, breast feeding, diapering. There is greater irregularity of nocturnal sleep during early postpartum than during late postpartum, similarly the mother's WASO gradually decreased with the development of their infants' sleep-wake rhythm. There is a high frequency of WASO between birth and until the 9th or 10th week postpartum after delivery, and the results increased significantly when compared with the control women. In the self-esti-mation by the mother, her sleep status (deep sleep, feeding after sleep) from late pregnancy to the 7th or 8th week after delivery was significantly) disrupted than those in late pregnancy. Mean scores for subjective feelings of fatigue continued at a high level until 10 weeks postpartum and gradually decreased towards to 15th weeks of post-partum, but was still significantly higher than in the control women. The numbers of subject complaints of "feel heavy in the head" , "become drowsy" , "feel strained in the eyes" , and "feel stiff in the shoulders" were significantly higher during the early postpartum week. The irregularity continues until about the 15th week after delivery, but is gradually decreasing as the infant develops a sleep-wake rhythm and feeding rhythm. We find that increased fatigue continues until the 12th week after delivery.

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