And wee Charlotte (Charlie) Hesson and her older sister Holly have the knack.
Holly made her grand entrance to the world three and a-half years ago, timing her summer arrival neatly between Otago cricket games.
Her younger sister had more room for error, but the margin was still pretty tight.
Charlotte (3.2kg) was born on Thursday morning, a few weeks before her father, Otago Volts coach Mike Hesson (35) was scheduled to leave for Brisbane, where he will lead the New Zealand A side in an emerging players tournament.
"The family has got used to it," Kate Hesson (33) said.
"Mike travelled a lot before we had a family ... and it gives us a bit of a breather," she joked.
With two potential Otago Sparks players in the brood, would the couple try for a future Volts player? "No.
"We're pretty happy to have two healthy children," Mike said.
