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At day 14.4 of gestation, although the mean body weight of male embryos was greater than that of female embryos, digit and palatal formation of female embryos was found to be more advanced than in males when compared according to their body weight. This was contrary to our previous finding of digit formation at the earlier stage (day 12.0 of gestation): namely, that digit development was more advanced in male embryos than in female embryos even when two sexes were compared according to their body weight. Thus, the development of female embryos catches up with that of male embryos at the later stages of midgestation. The period for digit development must be longer in male embryos than in female embryos. If mothers are exposed to some teratogens, a sex difference in incidence of digital defects might be produced.<\/jats:p>","DOI":"10.1002\/tera.1420400408","type":"journal-article","created":{"date-parts":[[2005,6,11]],"date-time":"2005-06-11T15:43:08Z","timestamp":1118504588000},"page":"359-364","source":"Crossref","is-referenced-by-count":4,"title":["Sex difference in digit and palate formation of mouse embryos at midgestation"],"prefix":"10.1002","volume":"40","author":[{"given":"Toshiaki","family":"Watanabe","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akira","family":"Endo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,6]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"970","article-title":"Sex liability to single structural defects","volume":"132","author":"Arena J. F. P.","year":"1978","journal-title":"Am. J. Dis. 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