| child birth | 0.86 | Recovering from child birth was something else. | ||
| surrogate birth | 0.46 | That effectively bans surrogate births because an egg removed for fertilization cannot be implanted in another woman. | ||
| elephant birth | 0.26 | Since then, the zoo has had a second elephant birth. | ||
| playoff birth | 0.26 | The Buccaneers can clinch a playoff birth with a victory. | ||
| twin birth | 0.26 | Calvert said horse breeders try to avoid twin births. |