| She gave birth to a healthy baby boy three years ago by way of in vitro fertilization. |
| Our ability to detect doubly recombinant chromosomes depends on the genotype of the homolog after fertilization. |
| During copulation, the female transfers unfertilized eggs to the male's ventral surface, where fertilization takes place. |
| Since in vitro fertilization started, two decades ago, there has been an explosion of twins, triplets, quadruplets, even quintuplets. |
| During pollination the female portion of the plant receives pollen from the tassel, resulting in fertilization of the ovule. |
| This relationship required water for fertilization, so this group grew close to the ground, often preserving the thallophytic structure. |
