Complex sentence: The gestation period of an elephant is 22 months and fertile females usually give birth every 3-6 years, so if she lives to around 50 years of age, she would have around 7 offspring.
Split into simpler sentences: The gestation period of an elephant is 22 months. Usually, a female will give birth every 3-6 years, which if she lives to around 50 years of age, allows her to have about 7 offspring.