第17周：宝宝变得更强壮啦
宝宝现在的大小，相当于 一个洋葱头.
平均长度: 12 厘米
（头到臀）
宝宝的发育情况
宝宝开始囤积脂肪啦，全身覆盖着一层白色的胎儿皮脂，这能保护他们娇嫩的皮肤。指甲正在生长，宝宝在肚子里翻滚、踢腿，偶尔还会打嗝。他们能对外界的响动做出反应了。
妈妈的身体变化
您的胃口大开，因为子宫的长大，腰部可能会有些酸痛。如果您起得太快可能会感到头晕。随着子宫占据更多空间，找到舒服的睡姿可能变得越来越难了。
给伴侣的小贴士
当她感到腿抽筋或头晕时，做她最坚实的依靠。您可以帮她按摩一下小腿，或者提醒她多休息。一起保持健康的饮食习惯，把厨房里装满营养丰富的零食吧。
References
[1]
Fetal Development: Week-by-Week Stages of Pregnancy - Cleveland Clinichttps://my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growth
[2]
Fetal development: The second trimester - Mayo Clinichttps://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/fetal-development/art-20046151
[3]
17 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-17/
[4]
Your Pregnancy Week by Week: Weeks 17-20 - WebMDhttps://www.webmd.com/baby/your-pregnancy-week-by-week-weeks-17-20
[5]
Leg cramps during pregnancy: Preventable? - Mayo Clinichttps://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/expert-answers/leg-cramps-during-pregnancy/faq-20057766