The tennis champion, who married her husband Alexis Ohanian is a star-studded ceremony in New Orleans in November, shared a photograph of herself on social media cradling her baby daughter.
She captioned the sweet picture of her three month old: 'Fellow moms: How long did you breastfeed? Is it weird that I get emotional when I even just think about when it's time to stop?'
Fellow moms:— Serena Williams (@serenawilliams) December 6, 2017
How long did you breastfeed? Is it weird that I get emotional when I even just think about when it's time to stop? pic.twitter.com/YOz4oeIajH
After sharing her worry about breastfeeding and knowing the right time to start weaning her baby, other mums rushed to reply to the star, and reassure Serena that feeling emotional about the subject was totally normal.
'It is emotional especially since she still very young,' replied one person on Twitter. 'Be happy you were able to do it for the time that you have. Please be okay with that.'
'It's definitely an individual choice. I went a year with my twins, but there's no rule. Trust your instincts,' advised someone else.
'She so adorable, Serena!' read one response referring to baby Alexis. 'I breast feed my daughter/son a short period of time. However, I have a relative who is still breastfeeding her 24 month old. I think it all depends on the person, professional, etc.'
'I went 2 yrs with my oldest and 3 yrs with the second. It's different for each of us and however long you're able to nurse is wonderful,' replied another person.
Another mother added: '9 months, 6 months, and no, not weird at all. You'll know when. Trust your instincts. You will miss it (the convenience, the bonding) but I found there was a point where I wanted my body back. Just me :)'
What do you think? When did you stop breastfeeding? Did you find it an emotional time? Share your thoughts with us in the comments below.