Pregnancy Loss Isn't Rare — It's the Biological Norm

Reframing Pregnancy: A Biological Reality

When we think about pregnancy, most of us imagine a smooth path to parenthood — a positive test, an ultrasound, and eventually, a healthy baby. But what if that idealized journey isn't the norm? What if, in fact, many pregnancies end in loss — not due to personal choices or bad luck, but because of biology?

I've been exploring this question with Kate Clancy, a professor of anthropology at the University of Illinois Urbana-Champaign. Her new book, Pregnancy Interrupted: The Science and Stories of How Pregnancies Really End, offers an eye-opening look into what happens behind the scenes of conception and pregnancy — a story often hidden from public view.

"The biggest issue is that we frame [a full-term pregnancy] as the normative experience," Clancy told me. "And that anything that doesn't follow that is the deviation."

In her book, Clancy argues that pregnancy loss — whether early miscarriage or stillbirth — may be the most common outcome rather than a rare occurrence. This isn't just an academic point. It's a deeply personal one for millions of people who've experienced loss and wondered if it was their fault.

Why So Many Pregnancies Don't Make It

The biological reality is more complex than many people realize. Before a pregnancy can develop into a full-term baby, it must pass through multiple checkpoints — from fertilization to implantation, from cellular division to placental development. And at each stage, the process isn't guaranteed.

Clancy described how our reproductive systems operate on what she calls 'a spaghetti model' — many eggs are made, but most are nonviable. Fertilization itself is a gamble; not every sperm will successfully reach an egg, and even when they do, many embryos don't make it past the earliest stages.

"Most of them are garbage," Clancy explained, pointing to how many early miscarriages happen silently, often before a person even realizes they were pregnant. Even after implantation, embryos face a high risk of failure — not because of parental behavior, but due to genetic abnormalities and developmental challenges.

One fascinating part of her research is how some embryos can 'self-correct' genetic flaws, shifting cells that carry errors into the placenta while allowing healthier ones to form the baby. It's a reminder that biology isn't rigid — it's adaptive and sometimes surprising.

The Fault Isn't Yours

It's not just about science; it's also about human emotion. Many people who've experienced pregnancy loss feel guilt or blame themselves, even when the cause is biological. Clancy's work aims to shift that narrative.

"The first half of the book is on the science of pregnancy and it really shows you how inevitable a large percentage of pregnancy loss is," she said. "Unfortunately, lots of [embryos] were never going make it, no matter what that person did."

This is where policy and public health intersect with personal experience. Environmental pollutants, endocrine disruptors, and even intimate partner violence can all increase the risk of pregnancy loss — factors beyond an individual's control.

Clancy points out that these are systemic issues. "It really has a lot more to do with what the government does or doesn't do to protect the population," she said. From food safety to environmental regulations, the structures we build have real consequences for reproduction.

Breaking Down the Narrative

Another major theme in Clancy's book is challenging the idea that pregnancy is a battleground between mother and fetus. This concept — often called 'maternal-fetal conflict' in evolutionary biology — has entered popular language in ways that can be harmful and misleading.

Phrases like "I'm hosting a parasite" or "I'm just a short-term rental" reflect an adversarial view of pregnancy, which is not supported by science. "The science is much more cooperative," Clancy said. "There are ways in which each is invested in the other's survival."

This perspective shifts how we understand pregnancy — not as a conflict, but as a shared journey, even when it ends differently than expected. It's a compassionate reframe that can help people feel less alone.

A Personal and Public Matter

Clancy's research was informed by interviews with dozens of people who've experienced pregnancy loss — many of whom felt isolated in their grief. "The main thing is to come away with a bigger understanding of what is often a private, quiet, lonesome process," she said.

This isn't just about the statistics; it's about real people, real stories, and the need for empathy in public discourse. Clancy's goal was never to diminish the pain of loss — but to help others understand that their experience isn't a failure or a personal shortcoming.

In an age where social media often amplifies false narratives about health and fertility, her book provides a necessary corrective. By grounding the conversation in science, biology, and empathy, she helps us see pregnancy not as a journey we all must take successfully, but as a complex process shaped by factors far beyond our control.

The Bigger Picture

Clancy's work also raises important questions about how society supports those who experience reproductive loss. How do we better protect public health? How do we ensure that people feel supported rather than blamed?

As a society, we still struggle to treat pregnancy and fertility with the complexity they deserve. But if we can start by acknowledging the biological reality of pregnancy loss — that it's not rare, it's not a personal failure, and it's often beyond our control — then we may begin to heal.

We all have a role to play in shifting how we talk about these issues, whether in medical settings, policy rooms, or everyday conversations. Clancy's work is a reminder that science and compassion go hand in hand — especially when it comes to matters as personal and profound as pregnancy.