<prompt> Embryonic phase of development is from -1-3 weeks4th to 8th week0-4thweek6th to 9th week  <response>: Ans. is b i.e., 4th to 8th week The development of a new individual in the uterus involves three phasesi Pre-embro phase or germinal phase day 0-3 weeks.ii Embro phase or embryonic period weeks 4-8.iii Fetal phase weeks 8-38. 