Madonna has said she may adopt another child from abroad following her proposed adoption of a one-year-old baby boy, David Banda, from Malawi.
"I wouldn't rule it out... but I would like to experience David for a while and see how it works out," she told the BBC's Newsnight programme.
In a separate interview on NBC's Today show in the US, Madonna accused critics of the adoption of being "racist".
"I think it's still considered taboo," said the 48-year-old singer.
"A lot of people have a problem with the fact that I've adopted an African child, a child who has a different colour skin than I do," she added.
David is currently living with Madonna and her family in London after the US star was granted a temporary custody order.
Madonna also has two older children, Lourdes and Rocco
The singer confirmed the child was wearing a red string bracelet, worn by devotees of Kabbalah, a branch of ancient Jewish mysticism which Madonna follows.
"If David decides he wants to be a Christian, then so be it," she told the Today show.
"I believe in Jesus and I study Kabbalah, so I don't see why he can't too."
She said David was "hysterically funny" but also had a "terrible temper".
Madonna told Newsnight that she had offered to support the baby and leave him in Malawi, but his father declined.
She "became interested in him" after being told he had been "left in the orphanage", she told the BBC.
The singer denied newspaper reports that David had regular visits at the orphanage from his father and his grandmother.
"If someone had said to me, 'His dad comes every week or his granny visits on a regular basis and he's well looked after,' I would not even have given it another thought."
A case brought by Malawi rights groups challenging the adoption earlier this month has been adjourned until 13 November.
The child's father, Yohane Banda, has protested against moves to halt the adoption.
Madonna funds six orphanages through her Raising Malawi charity and is setting up an orphanage for 4,000 children in a village outside the capital, Lilongwe.