Mother’s Day is still a few weeks off, but athletes who are moms and moms who raised athletes are getting the love fest going early.

The world’s No. 1 ranked tennis player, Serena Williams, who is 20 weeks pregnant, posted a belly shot on her Instagram account with a message for her baby. She said,

My Dearest Baby, You gave me the strength I didn’t know I had. You taught me the true meaning of serenity and peace. I can’t wait to meet you. I can’t wait for you to join the players box next year. But most importantly, I am so happy to share being number one in the world with you…. once again today. On @alexisohanian bday. 😉 from the world’s oldest number one to the world’s youngest number one. -Your Mommy

Williams made headlines last week when she announced she was expecting with fiancé Alexis Ohanian . And yes, she won the Australian Open in January, her 23rd Grand Slam, while pregnant.

Noticing the powerful message Williams wrote, Annie Apple, New York Giants cornerback Eli Apple’s mom, took to Twitter with her own thoughts about being pregnant.

It’s certainly clear from these ladies. Motherhood changes everything.