She added on her Instagram Story: “In the simplest of terms, we can say my placenta is really, really weak.
“I feel really good. The baby is so healthy, growing stronger than Luna or Miles. He moves a lot. He moves so much earlier than they ever did… he’s so different than they were. He’s strong…
“But basically, he’s the strongest coolest dude in the s——– house. His house is just falling apart. It didn’t have a good foundation to begin with.”
Teigen and her baby need to get through the next few weeks to make it out of the “danger zone,” which she admitted is scary but in a way “where there’s nothing to do.”
And the 34-year-old star appealed to her fans who are also doctors to stop sending unsolicited medical advice.
She said: “If you are a doctor, I cannot express enough how badly I’d like you to stop your guessing games.
“You have to trust me that I have very good doctors, who know what they’re doing. There’s so much more than you can ever imagine. I share a lot, but not absolutely everything.
“So trust me when I say they know and I just want to keep things so simple for you guys.”