-Smuggling gangs on site offer the women to be smuggled out.
It often costs around $ 15,000.
Money sent by relatives.
The women then go to Turkey to be sent from there to their home countries.
The Kurds themselves call al-Hol a leaking sieve, says Vera Mironova.
SVT has spoken to relatives in Sweden who sent money for their daughter or sister to be smuggled out.
A man says that his daughter was part of a group of six Swedish IS women with children who were smuggled out of al-Hol in June.
Shortly after the women were smuggled out, they were arrested and imprisoned.
Now they have moved to the Camp Roj refugee camp.
-We borrowed money from relatives and friends.
But we were deceived, he says.
West Swedish IS woman managed to get home
The survey carried out by SVT shows that eight of the total of at least 13 smuggled IS women have since been arrested.
In addition to the six women who were arrested and detained in Camp Roj, two Swedish women and their children have been arrested by the Syrian army and are now in Syrian prison.
Others who have been smuggled out have come further.
A West Swedish woman managed this summer to get all the way to Sweden.
And right now, four Swedish IS women with a total of nine children in custody in Turkey are waiting to be sent to Sweden.
It is mainly from al-Hol that women and children have been smuggled out.
From Camp Roj, it is only known that a woman managed to get out.
The woman, who is Swedish, is wanted in Europe for kidnapping, because she brought her child to IS from Sweden without the father's knowledge.
Where she is today is unknown.