That bump’s past blossoming…it’s GIANT! And experts say she could be induced right away if she really is 21 days past her due date.

We’ve been saying Selma Blair is “about to burst” for weeks — even months — now, but still, the Cruel Intentions star, 39, flaunts fabulous maternity frocks and high heels on a daily basis. Not to mention her baby bump is so huge, we don’t even know why or how she’s still standing! How healthy could this be?

“To truly be three weeks overdue is a bit concerning,” Dr. Melody T. McCloud, obstetrician-gynecologist and author of Living Well, Despite Catchin’ Hell: The Woman’s Guide to Health, Sex and Happiness tells HollyBaby.com. “There is concern about decreased amounts of amniotic fluid, which could cause cord compression.”

“Also risk of the baby having fetal distress which results in he/she passing stool (called meconium) which could get into the baby’s lungs and cause fetal distress, poor oxygenation, even death of the fetus,” Dr. McCloud adds.

“If she is truly three weeks overdue, I’d think induction of labor would soon be in order. Just as it’s not good to deliver a child too early, the longer a pregnancy last after forty or forty-two weeks, the more risk of intrauterine fetal demise and complications, including aspiration of meconium for the infant.”

And obstetrician Dr. Tara Solomon agrees. “OB GYNs usually only go 10 days post term delivery because of the risk of low fluid, and umbilical cord compression,” she explains. “No Hollywood doctor would take that risk.”

Selma, who was reportedly due to give birth on July 4, is expecting her first baby with boyfriend Jason Bleick.

So is she really overdue? Or just carrying really big late in term?

–Leigh Blickley

More Selma on HollyBaby:

1. Hot New Pregnancy Trend: Prenatal Yoga! January Jones & More Are Doing It!
2. Selma Blair & Tori Spelling BUMP OFF In Blue!
3. Pregnant Selma Blair Has A Whole Month To Go, But She Looks Ready To Burst!