Concept:Gestation period is the length of time a developing offspring is carried inside the mother.
Explanation:Conception is the moment when a sperm fertilises an ovum.
Parturition is the act of giving birth.
The gestation period runs from conception up to parturition.
It includes the full development of the embryo and fetus in the uterus.
It does not include the fusion of gametes or the release of the ovum from the ovary.
Therefore, the correct description is the time between conception and parturition.
Answer:B. between conception and parturition