– Every year, hundreds of pregnant Russian women travel to the United States to give birth so that their child can acquire all the privileges of American citizenship.

They pay anywhere from $20,000 to sometimes more than $50,000 to brokers who arrange their travel documents, accommodations and hospital stays, often in Florida.

While the cost is high, their children will be rewarded with opportunities and travel advantages not available to their Russian countrymen. The parents themselves may benefit someday as well.

And the decidedly un-Russian climate in South Florida and the posh treatment they receive in the maternity wards — unlike dismal clinics back home — can ease the financial sting and make the practice seem more like an extended vacation.

The Russians are part of a wave of “birth tourists” that includes sizable numbers of women from China and Nigeria.

President Donald Trump has spoken out against the provision in the U.S. Constitution that allows “birthright citizenship” and has vowed to end it, although legal experts are divided on whether he can actually do that.

Although there have been scattered cases of authorities arresting operators of birth-tourism agencies for visa fraud or tax evasion, coming to the U.S. to give birth is fundamentally legal. Russians interviewed by the Associated Press said they were honest about their intentions when applying for visas and even showed signed contracts with doctors and hospitals.

There are no figures on how many foreign women travel to the U.S. specifically to give birth. The Center for Immigration Studies, a group that advocates for stricter immigration laws, estimated that in 2012, about 36,000 foreign-born women gave birth in the U.S., then left the country.

The Russian contingent is clearly large. Anton Yachmenev of the Miami Care company that arranges such trips, told the AP that about 150 Russian families a year use his service, and that there are about 30 such companies just in the area.

South Florida is popular among Russians not only for its tropical weather but also because of the large Russian-speaking population. Sunny Isles Beach, a city just north of Miami, is even nicknamed “Little Moscow.”

“With $30,000, we would not be able to buy an apartment for our child or do anything, really. But we could give her freedom. That’s actually really cool,” said Olga Zemlyanaya, who gave birth to a daughter in December and was staying in South Florida until her child received a U.S. passport.

An American passport confers many advantages. Once the child turns 21, he or she can apply for “green card” immigration status for the parents.

Traveling to the U.S. on a Russian passport often requires a laborious interview process for a visa. Just getting an appointment for the interview can take months.

Some Russians fear that travel opportunities could diminish as tensions grow between Moscow and the West, or that Russia might even revert to stricter Soviet-era rules for leaving the country.

“Seeing the conflict growing makes people want to take precautions because the country might well close its borders. And if that happens, one would at least have a passport of a different country and be able to leave,” said Ilya Zhegulev, a journalist for the Latvia-based Russian website Meduza that is sharply critical of the Kremlin.

Last year, he sold two cars to finance a trip to California for Zhegulev and his wife so she could give birth to their son.

Floridians have shown no problem with the influx of expectant mothers from Russia.

Yachmenev, the agency manager, says he believes it’s good for the state because it brings in sizable revenue.

Svetlana Mokerova and her husband went all out, renting an apartment with a sweeping view. She relished the tropical vibe, filling her Instagram account with selfies backed by palm trees and ocean vistas.

“We did not have a very clear understanding about all the benefits” of a U.S. passport, she said.

“We just knew that it was something awesome,” added Mokerova, who gave birth to a daughter after she was interviewed.