If Williams is indeed 20 weeks into her term, that would mean she was approximately two months pregnant when she captured her record 23rd Grand Slam tournament singles title at the Australian Open in January.
The world number 181 is the first mother since 1980 champion Evonne Goolagong to reach the Wimbledon final.
Serena had said on Monday that she "can't wait for the future" as she warmed up for her return to the WTA Tour at the Tie Break Tens exhibition at Madison Square Garden.
Germany's experienced Angelique Kerber stands in the way of the 36-year-old American and an eighth, and arguably most impressive, All England Club singles crown which would see her match Margaret Court's all-time record of 24 Grand Slam titles.
Twitter lit up with reactions after Naomi Osaka defeated the American in a stormy final on Saturday:
Serena wanted to have Italian food. Alexis gifted her an Italian vacation.
Serena's designs were created to celebrate "women who turn fear into courage and doubt into confidence."
A trio of tennis moms-Naomi Osaka, Angelique Kerber and Caroline Wozniacki-are poised for comebacks at the Australian Open.
Through their triumphs and struggles, these athletes have not only rewritten the narrative of women in sports but have also ignited a flame of empowerment and inspiration, asserts Laxmi Negi.
Serena Williams said the work is never done for mothers who are also professional tennis players following her victory over fellow mom Tsvetana Pironkova in the US Open quarter-finals on Wednesday.
Venus Williams targets return for Indian Wells and Miami
Serena Williams appeared on stage with the American popstar at Hyde Park festival.
The players have been allowed out to practise for five hours a day during their quarantine but Djokovic said he had headed to a local park on his first morning in Australia without restrictions.
From bold colour-blocking to sleek silhouettes, US Open 2024's collections feature the latest trends in tennis fashion.
The tennis champion's daring bodysuits made a comeback on the latest GQ cover.
The former world No 1 has her sights set on the upcoming Australian Open as her comeback platform, and she's already deep into training following what she playfully terms 'a cool little intermission'.
Sabalenka crashed to a 6-7(5), 6-4, 6-4 defeat to Russian teenager Mirra Andreeva
Serena Williams thrashed unseeded Russian Elena Vesnina 6-2, 6-0 to reach a ninth Wimbledon final on Thursday.
'I want her to know that being strong is never easy. Not in this world we are living in.'
The tennis super star in a zingy, glamorous avtar.
Serena Williams was once again on the stage but this time it was her own fashion show during New York Fashion Week.
After winning the US Open title on Sunday, Novak Djokovic pulled out a T-shirt with 'Mamba Forever' on the front and the number 24 on the back.
We bring you five achievers who are proof that 35 is the new 25.
Urals and Sokol accounted for every 4 out of 5 barrels of Russian supplies to India last year.
Coco Gauff became the first American to win a US Open singles title since Sloane Stephens in 2017.
'He's done a lot for the African American community, and it's cost him a lot. It's sad' 'To be compared to Ali or Jordan, I really have no words'
Images from Day 2 of the 2020 US Open in New York
Iga Swiatek celebrated her 21st birthday with a cake at the Roland Garros.
Miss Universe Harnaaz Sandhu was spied at at four shows at New York Fashion Week in A-lister seats, and, of course, in full fashion regalia.
The beauty queen could not hold back her tears as she took to the stage one last time as Miss Universe.
Images from Day 6 of the Australian Open in Melbourne, on Saturday.
The tennis ace showed off her sleek jet black extensions that cascaded down to her back.
'Putting match-ups in tennis like Serena Williams and Roger Federer on the same court, it is so brilliant for our sport'
Naomi Osaka launched her signature swimwear line.
'It's such an honor to be a part of the Barbie Role Model series'
Those not familiar with seeing Swiatek close up can expect to see her sliding on Wimbledon's grass, as she does on the clay
'Baby Fed' steals hearts with the same ease that he wins matches.
The two-day away tie will be played from April 16 on the indoor hard courts at the National Tennis Centre, Lielupe, Jurmala.
In the 18 years that she has been on tour, Sania Mirza was the standard-bearer for tennis in the country. Never before had an Indian player dominated from the back court with such conviction. Deepti Patwardhan Salutes the Incomparable Sania Mirza.
Don't settle for an ordinary babymoon. Get inspired by these six celeb-inspired destinations to visit before your due date.