Which statement summarizes the process of ovulation?The sperm penetrates the egg membrane, and they fuse together.The egg attaches to the lining of the uterus.An egg emerges from the ovary and travels down the fallopian tube.The egg begins to divide quickly.
During the [___] trimester, the fetus’s sex organs develop.
The umbilical cord forms during the [___] trimester.
The lungs do not develop until the [___] trimester.
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