in human development week 9 to 36 is the fetal stage (second and third trimester) and during this time organs formed in the embryonic period continue to develop and the fetus grows in size and weight. The first 8 weeks of development is considered the embryonic period and is divided into 23 Carnegie stages based upon developmental milestones. Note when searching an alternate spelling "foetal". (More? Fetal | Embryo Stages)
The name given to the developing life within the female body following the embryonic period. The embryonic period lasts from conception to about Week 12 in the Diary (10th week of gestation).
FEE-tal PEER-e-od The final stage of prenatal development, when structures grow and elaborate. 216