Sarah Jessica Parker, Matthew Broderick Jump on Hollywood's Surrogate Trend

Sarah Jessica Parker and Matthew Broderick's announcement Tuesday that they are expecting twins this summer wasn't exactly the announcement many had expected.

(Clockwise from upper left) Joan Lunden, Angela Bassett, Sarah Jessica Parker and Deidre Hall are among a growing list of celebrities who have chosen the path of surrogacy to have children.

(Getty Images)

Only recently, the couple had been dogged by rumors that they were divorcing -- something Broderick's rep Simon Halls told ABCNews.com was "ludicrous and untrue."

Included in the surprise announcement was the news that Parker, who had given birth to the couple's first child, son James Wilkie, now 6, would not be carrying the twins, rather, a surrogate would.

"Sarah Jessica Parker and Matthew Broderick are happily anticipating the birth of their twin daughters later this summer with the generous help of a surrogate. The entire family is overjoyed," their reps said in a statement widely reported in the press.

While many questions remain unanswered about why Parker, 44, and Broderick, 47, have gone the surrogacy route, they are certainly not alone. The couple joins a long line of other celebrities who have chosen this increasingly common path to having children and aren't afraid to talk about it.

As a result, some of the stigma that once accompanied surrogacy seems to be diminishing.

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"We don't see where people are afraid anymore. It used to be, 'Oh no, we're not going to tell anybody,'" said Joanne Bubrick, program director for the Center for Surrogate Parenting's Los Angeles office. "They are proud now."

Bubrick says celebrities, such as Kelsey Grammer and his wife Camille, former "Good Morning America" host Joan Lunden and actresses Angela Bassett and Deidre Hall -- all former Center for Surrogate Parenting clients -- have helped "legitimize" surrogacy by talking about their struggles to have children before turning to a surrogate.

Shirley Zager, director of the Organization of Parents Through Surrogacy, a national support group, told New York Times writer Alex Kuczynski, who wrote last year about her experience using a surrogate, that there have probably been about 28,000 surrogate births since 1976.

These births don't come cheap. Kuczynski was quoted a figure of $30,000 to $60,000 for all the costs associated with the surrogate. On top of that, she had to pay an additional $10,000 for egg retrieval and fertilization and embryo transfer to the surrogate. In her case, the money for the surrogate went into an escrow account and was paid in monthly installments.

Deidre Hall used a surrogate twice.

Hall, the "Days of Our Lives" star, was one of the first to go public with using a surrogate in 1992. She appeared in People magazine and produced and starred in a television movie based on her 20-year battle with infertility that finally ended with two successful births via a surrogate.