Germinal
The period immediately following conception and lasting through implantation.
The baby from two to eight weeks after conception.
Embryo
The baby during the final stage of development, from the beginning of the third month until birth.
Fetus
The first stage of birth signaled with the onset of contractions.
Labor
The author of Psalm 139 "I am fearfully and wonderfully made".
David
A fertilized ovum.
Zygote
The outer layer of the embryo's cells that forms the skin and nervous system.
Ectoderm
Age at which the baby might survive outside the womb.
Age of Viability
The second stage of the birthing process including transition and the head moving out of the birth canal.
Birth
Simultaneously born offspring who develop from two separate ova.
Dizygotic Twins
Hollow sphere of cells that form several days after conception.
Blastula
The middle layer of the embryo's cells that develops into muscle, blood, and excretory systems.
Mesoderm
Tubes of tissue connecting the placenta to the baby.
Umbilical Cord
The final stage of birth.
Afterbirth
Toxic agents that cause abnormalities or birth defects.
Teratogen.
The embedding of the blastula in the uterine wall.
Implantation.
The inner layer of the embryo's cells that becomes the digestive system, lungs, and glands.
Endoderm
The three periods of pregnancy. Hint: Developmental terminology rather than medical terminology.
Trimesters
The name given to a newborn baby.
The neonate
A coating around neurons in the central nervous system.
Myelin Sheath
Two offspring who began life as a single zygote.
Monozygotic Twins
The sac of liquid within the uterus that protects the developing baby.
Amniotic Sac.
The cheesy substance that protects the baby's skin from amniotic fluid.
Vernix Caseosa
Breech.
A fatty substance that helps the lungs to inflate after birth.
Surfactant