Examlex
The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III.
The object's acceleration is zero only in region II.
First Trimester
The initial stage of pregnancy, encompassing roughly the first 12 weeks, critical for the development of the embryo/fetus.
Sperm Fertilizes
The process by which a sperm cell unites with an egg cell, resulting in the beginning of pregnancy.
Zygote
The initial cell formed when a sperm cell fertilizes an egg cell, marking the beginning of a developing organism.
Myometrium
The muscular layer of the uterus that contracts during childbirth to help deliver the baby.
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