A nine-months-pregnant Chicago teen was found strangled to death with her unborn child carved out of her womb — and she may have been lured to her death by a woman she met on a Facebook group for young moms, according to police and reports.

The decomposed body of 19-year-old Marlen Ochoa-Lopez – who had been missing for the last three weeks – was found dumped in a garbage can just after midnight Wednesday in the backyard of the unidentified woman’s home on the city’s Southwest Side.

The teen victim’s baby boy, who was “forcibly removed” from Ochoa-Lopez’s body after her death, had been taken to an area hospital on April 23 – the day Ochoa-Lopez vanished and “before [police] figured out what was going on,” a Chicago police official told The Post Thursday.

The victim’s family say a 46-year-old suspect had enticed Ochoa-Lopez to come to her home by offering the young woman free extra baby clothes for her unborn son via the Facebook group “Help A Sista Out,” according to local reports.

“She was giving clothes away, supposedly under the pretense that her daughters had been given clothes and they had all these extra boy clothes,” said Cecelia Garcia, a spokeswoman for the victim’s family said.

Screenshots obtained by CBS Chicago show Ochoa-Lopez posted a message to the group before her disappearance, and user replied: “I’m on the southside of Chicago by 79th and Pulaski if you want to wait a week my girl has all brand New boy clothes her son never wore.”

“Yes girl that’s fine thank you so much,” Ochoa-Lopez replied, according to the screenshot.

After leaving her high school on April 23, Ochoa-Lopez apparently went to the woman’s home, the Chicago Sun-Times reported.

Ochoa-Lopez was supposed to pick up her 3-year-old son from daycare that afternoon, but she never showed up, according to her family.

That same day, medics responded to the 46-year-old woman’s West 77th Place home after she called for help claiming that she had given birth and her baby was unresponsive, the Sun-Times reported.

The 46-year-old later set up a now-defunct GoFundMe account to raise $9,000 for the baby’s future funeral as she claimed that the boy was sick and on the verge of dying, Sara Walker, a local student pastor assisting with helping the victim’s family, told the Chicago Sun-Times.

Walker told the news outlet that a tip led police to verify the baby’s biological parents with saliva from Ochoa-Lopez’s husband, Yovani Lopez, and hair samples from the mom’s home.

DNA tests confirmed that the baby is Ochoa-Lopez’s, family said.

“I have a lot of pain, a lot of anguish, a lot of sadness,” Lopez told reporters in Spanish Wednesday. “It’s painful to lose your wife, the woman you love the most. It’s painful.”

On Tuesday – before the grisly discovery of Ochoa-Lopez’s body — police took several people at the West 77th Place home into custody, authorities said.

Three people remain in custody on the suspicion of Ochoa-Lopez’s murder and charges against them are pending, police said.

“We believe all of them played some role in this unspeakable act of violence,” Chicago Police Department spokesman Anthony Guglielmi said at a Wednesday press conference.

The newborn, named Yadiel, suffered severe brain damage and may be pulled from life support, the Chicago Sun-Times reported.

With Post Wires