According to MetroSource News this situation was not planned and was totally a coincidence.
On Friday, sisters Saby and Leslie both gave birth within hours of each other in a Chicago hospital. Then on Saturday, the third sister Lilian gave birth at the same Chicago hospital. Finally on Monday (the fourth day), Heidi (the fourth sister) gave birth to the fourth baby in California.
What are the odds?!? Imagine how crazy it will be when their birthdays roll around, at least the dates will be easy for everyone to remember.