“Congratulations, it’s a boy!” Or, “Congratulations, it’s a girl!”

As a pediatrician for nearly 20 years, that’s how many of my patient relationships began. Our bodies declare our sex.

Biological sex is not assigned. Sex is determined at conception by our DNA and is stamped into every cell of our bodies. Human sexuality is binary. You either have a normal Y chromosome, and develop into a male, or you don’t, and you will develop into a female. There are at least 6,500 genetic differences between men and women. Hormones and surgery cannot change this.

An identity is not biological, it is psychological. It has to do with thinking and feeling. Thoughts and feelings are not biologically hardwired. Our thinking and feeling may be factually right or factually wrong.

If I walk into my doctor’s office today and say, “Hi, I’m Margaret Thatcher,” my physician will say I am delusional and give me an anti-psychotic. Yet, if instead, I walked in and said, “I’m a man,” he would say, “Congratulations, you’re transgender.”

If I were to say, “Doc, I am suicidal because I’m an amputee trapped in a normal body, please cut off my leg,” I will be diagnosed with body identity integrity disorder. But if I walk into that doctor’s office and say, “I am a man, sign me up for a double mastectomy,” my physician will. See, if you want to cut off a leg or an arm you’re mentally ill, but if you want to cut off healthy breasts or a penis, you’re transgender.

No one is born transgender. If gender identity were hardwired in the brain before birth, identical twins would have the same gender identity 100 percent of the time. But they don’t.

I had one patient we’ll call Andy. Between the ages of 3 and 5, he increasingly played with girls and “girl toys” and said he was a girl. I referred the parents and Andy to a therapist. Sometimes mental illness of a parent or abuse of the child are factors, but more commonly, the child has misperceived family dynamics and internalized a false belief.

In the middle of one session, Andy put down the toy truck, held onto a Barbie, and said, “Mommy and Daddy, you don’t love me when I’m a boy.” When Andy was 3, his sister with special needs was born, and required significantly more of his parents’ attention. Andy misperceived this as “Mommy and Daddy love girls. If I want them to love me, I have to be a girl.” With family therapy Andy got better.

Today, Andy’s parents would be told, “This is who Andy really is. You must ensure that everyone treats him as a girl, or else he will commit suicide.”

As Andy approaches puberty, the experts would put him on puberty blockers so he can continue to impersonate a girl.

It doesn’t matter that we’ve never tested puberty blockers in biologically normal children. It doesn’t matter that when blockers are used to treat prostate cancer in men, and gynecological problems in women, they cause problems with memory. We don’t need testing. We need to arrest his physical development now, or he will kill himself.

But this is not true. Instead, when supported in their biological sex through natural puberty, the vast majority of gender-confused children get better. Yet, we chemically castrate gender-confused children with puberty blockers. Then we permanently sterilize many of them by adding cross-sex hormones, which also put them at risk for heart disease, strokes, diabetes, cancers, and even the very emotional problems that the gender experts claim to be treating.

P.S. If a girl who insists she is male has been on testosterone daily for one year, she is cleared to get a bilateral mastectomy at age 16. Mind you, the American Academy of Pediatrics recently came out with a report that urges pediatricians to caution teenagers about getting tattoos because they are essentially permanent and can cause scarring. But this same AAP is 110 percent in support of 16-year-old girls getting a double mastectomy, even without parental consent, so long as the girl insists that she is a man, and has been taking testosterone daily for one year.

To indoctrinate all children from preschool forward with the lie that they could be trapped in the wrong body disrupts the very foundation of a child’s reality testing. If they can’t trust the reality of their physical bodies, who or what can they trust? Transgender ideology in schools is psychological abuse that often leads to chemical castration, sterilization, and surgical mutilation.