The fertilization process takes about 24 hours .

受精的过程大概要24小时。

Although sperm have mitochondria , they degenerate shortly after fertilization of the egg .

虽然，精子具有线粒体，但其在卵子受精后不久即退化。

The highest is during ovulation , when the body releases an egg for fertilization .

高峰是在排卵期，这时身体会排放受精卵。

The traditional iud is a small , t-shaped plastic device that 's inserted into the uterus to block egg fertilization .

传统的iud是一个小的、t型的塑料制品，并植入子宫中从而阻止卵子受精。

85-year-old Englishman robert edwards wins the nobel prize in physiology or medicine for his 20-year effort to develop in vitro fertilization .

现年85岁的英国科学家罗伯特爱德华兹，因在体外受精方面20年如一日所作出的努力，而获得了诺贝尔生理学奖或医学奖。