Alyssa Milano has joined a host of celebrities calling for a change to the new abortion law passed in the US state of Georgia.

Under the law, abortion is prohibited once doctors can detect a heartbeat in the foetus, that is often about six weeks into the pregnancy and sometimes before a woman even knows she is pregnant.

Georgia is one of six US states that has a heartbeat abortion law.

Milano says the only way to change the minds of male politicians is to withhold sex.

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"Our reproductive rights are being erased. Until women have legal control over our own bodies we just cannot risk pregnancy … JOIN ME by not having sex until we get bodily autonomy back. I'm calling for a #SexStrike. Pass it on," she tweeted.

Milano heaped praise on JJ Abrams and Jordan Peele, who are about to start shooting their new TV show in Georgia, but announced they would donate the profits from the show to help fight the new law.

"In a few weeks we start shooting our new show, Lovecraft Country and will do so standing shoulder to shoulder with the women of Georgia. Governor Kemp's 'foetal Heartbeat' Abortion Law is an unconstitutional effort to further restrict women and their health providers from making private medical decisions on their terms. Make no mistake, this is an attack aimed squarely and purposely at women," the said in a statement.

"We will donate 100 per cent of our respective episodic fees for this season to two organisations leading the charge against this draconian law: the ACLU of Georgia and Fair Fight Georgia. We encourage those who are able to funnel any and all resources to these organisations."

Other celebrities have also spoken out against the new law.

Will and Grace star Debra Messing praised the Screen Actors Guild for moving to protect its female members.

Titanic star Frances Fishes echoed Messing's statement.

Westworld star Evan Rachel Wood had another extreme suggestion against abortion: mandatory vasectomies.

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