Final answer:
The second trimester in pregnancy is a crucial stage of fetal development where the fetus grows, becomes active, and the mother feels movements. The proliferative phase involves uterine lining growth due to estrogen, preparing for possible fertilization. Throughout the second trimester, significant developments occur in the fetus and the mother's body to support the pregnancy.
Explanation:
Second trimester in pregnancy lasts from weeks 13 to 28. During this phase, the fetus grows to about 30 cm, becomes active, and the mother can feel its movements.
The proliferative phase is the stage in the uterine cycle where estrogen causes the lining of the uterus to grow and prepares the environment for fertilization.
During the second trimester, the fetus continues to develop, the placenta takes over vital functions, and the mother's body goes through significant changes to support the growing baby.
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