http://www.ehd.org/dev_article_unit1.php The First Week | Prenatal Overview Endowment for Human Development http://www.ehd.org/dev_article_unit1.php http://www.ehd.org/dev_article_unit1.php http://www.ehd.org/dev_article_unit1.php http://www.ehd.org... begins at fertilization http://www.ehd.org/dev_article_unit1.php 208,000 nucleotides per second about a day takes place approximately 24 - 30 hours after conception EHD begins at fertilization Endowment for Human Development http://www.ehd.org/dev_article_unit1.php 208,000 nucleotides per second http://www.ehd.org/dev_article_unit1.php Amazing Weekly Ultrasound Videos! The First Week | Prenatal Overview takes place approximately 24 - 30 hours after conception newly conceived human being 208,000 nucleotides per second через 3-4 дня после оплодотворения http://www.ehd.org/dev_article_unit1.php The First Week