她还长出了一层细绒毛,补称做胎毛,通常会在36周的时候脱落并被毫毛替代。
She'u2019s also developing a thin layer of very fine hair called lanugo, which is normally shed and replaced with vellus hair by week 36.她还长出了一层细绒毛,补称做胎毛,通常会在36周的时候脱落并被毫毛替代。
She's also developing a thin layer of very fine hair called lanugo, which is normally shed and replaced with vellus hair by week 36.她还长出了一层细绒毛,补称做胎毛,通常会在36周的时候脱落并被毫毛替代。