第20周：一半啦！孕程过半！
宝宝现在的大小，相当于 一根香蕉.
平均长度: 25.6 厘米
（头到脚）
宝宝的发育情况
宝宝的指甲正在生长，大脑的感官区域也在飞速发育。全身覆盖着皮脂以保护皮肤，他们已经有了规律的睡眠和清醒周期，踢腿和出拳的力量也越来越大啦。
妈妈的身体变化
时间过半啦！本周您可能会感到明显的胎动。但也可能会遇到突如其来的腿抽筋，尤其是在晚上，试着做些伸展运动来缓解。医生通常会在 18-22 周安排大排畸超声检查，检查宝宝的情况。
给伴侣的小贴士
便秘可能会让她不舒服，帮她多准备一些富含纤维的食物，比如西梅或成熟的香蕉。提醒她不要久坐，多起来走走，这对她的舒适度很有帮助。
References
[1]
Fetal Development: Week-by-Week Stages of Pregnancy - Cleveland Clinichttps://my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growth
[2]
20 weeks pregnant guide - Best Start in Life - NHShttps://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/2nd-trimester/week-20/
[3]
Quickening In Pregnancy: First Movements & What To Expect - Cleveland Clinichttps://my.clevelandclinic.org/health/symptoms/22829-quickening-in-pregnancy
[4]
Leg cramps during pregnancy: Preventable? - Mayo Clinichttps://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/expert-answers/leg-cramps-during-pregnancy/faq-20057766
[5]
20-Week Ultrasound (Anatomy Scan) - Cleveland Clinichttps://my.clevelandclinic.org/health/diagnostics/22644-20-week-ultrasound
[6]
Pregnancy Constipation: Pain, Causes, Treatments & Relief - Cleveland Clinichttps://my.clevelandclinic.org/health/diseases/21895-pregnancy-constipation