Hello, I am Dr Supriya Puranik. Over my years in practice, I have sat with countless women experiencing the joy of a positive pregnancy test, closely followed by a wave of anxiety. “Is my baby safe?” “What are the chances of losing this pregnancy?”

If you are asking these questions, please know that your feelings are entirely normal. Pregnancy brings profound changes, and the fear of the unknown can feel overwhelming. My goal today is to give you clear, factual information about pregnancy loss. We will look at how the risk of miscarriage changes from week to week and how your age plays a role.

Understanding these numbers is not meant to frighten you. Instead, knowledge is a powerful tool that helps you take control of your health and find peace of mind. Let us break down the facts together.

What Is Early Pregnancy Loss?

First, let us define what we are talking about. A miscarriage is the loss of a pregnancy before the 20th week. It is a surprisingly common event, though it is not something people discuss openly. Many miscarriages happen before a woman even realises she is pregnant.

When a pregnancy is lost early, it is rarely anyone’s fault. You did not cause a miscarriage by exercising, drinking a cup of coffee, or feeling stressed. Most early pregnancy losses happen because the embryo has an abnormal number of chromosomes, meaning it simply could not develop as it should.

Knowing your specific risk factors helps us plan the best prenatal care for you. Let us look at how those risks change as your pregnancy progresses.

What Is the Miscarriage Risk by Week of Pregnancy?

The first trimester is when the majority of miscarriages occur. As your pregnancy progresses and your baby grows, the risk of loss drops significantly. Here is how the risk changes week by week.

Miscarriage Risk by Week Table

Weeks 3 to 4: The Earliest Stages

During these first few weeks, implantation occurs. This is when the fertilised egg attaches to the lining of your uterus. Miscarriage risk is at its highest during this window. Many losses at this stage are called chemical pregnancies. You might get a positive pregnancy test, followed by bleeding a few days later. Up to 50% to 75% of all miscarriages happen during this very early stage, often before you miss a period.

Weeks 5 to 7: The Risk Begins to Drop

By week five, we can usually see a gestational sac on an ultrasound. Your risk of miscarriage remains around 20% to 30% during this time, depending heavily on your age and health history. Once we detect a heartbeat—usually around week six or seven—your risk drops substantially. Hearing that tiny heartbeat is a massive milestone for your baby’s development.

Weeks 8 to 13: Finding Reassurance

Between weeks eight and thirteen, the risk of miscarriage plummets to roughly 2% to 4%. Your baby is growing rapidly, and the placenta is taking over the vital job of providing nutrients. Once you reach the end of your first trimester at week 12, the chances of losing the pregnancy fall below 2%. For many expectant parents, this is the time they choose to share their happy news with friends and family.

Weeks 14 to 20: The Second Trimester

Once you enter the second trimester, your risk of miscarriage drops to less than 1%. Late miscarriages do happen, but they are rare. When they occur, they are often related to different issues, such as structural problems with the uterus, weakened cervix, or underlying health conditions, rather than the chromosomal abnormalities that cause early losses.

How Does Age Affect Miscarriage Risk?

Your age is one of the most significant factors in determining your risk of miscarriage. As women get older, both the quantity and quality of their eggs decrease. This natural ageing process means a higher likelihood of chromosomal abnormalities in the embryo.

Here is a clear look at how age impacts your chances of a healthy pregnancy:

Miscarriage Risk by Age Table

Women Under 35

If you are under 35, your baseline risk of a recognised miscarriage is roughly 10% to 15%. Your eggs are generally of high quality, which gives the embryo the best chance of normal development.

Women Aged 35 to 39

At the age of 35, the medical community begins to use the term “advanced maternal age.” Your risk of miscarriage increases slightly to about 20%. While this number is higher, the vast majority of women in this age bracket go on to have incredibly healthy pregnancies and babies.

Women Aged 40 to 44

For women in their early 40s, the risk of miscarriage rises to approximately 35% to 40%. Because egg quality declines more rapidly during this decade, it is highly recommended to seek proactive prenatal care as soon as you find out you are pregnant.

Women Aged 45 and Older

By age 45, the risk of miscarriage reaches about 50% to 80%. Getting pregnant naturally at this age is more difficult, and the chances of pregnancy loss are high. However, with modern reproductive medicine, including options like IVF and donor eggs, many women in their late 40s successfully carry pregnancies to term.

How Can You Protect Your Pregnancy?

While we cannot control our age or prevent chromosomal abnormalities, you can take practical steps to give your pregnancy the best possible environment to thrive.

• Take a Folic Acid Supplement: Start taking a prenatal vitamin containing at least 400 micrograms of folic acid every day. This helps prevent severe birth defects of the brain and spine.
• Manage Underlying Conditions: If you have diabetes, high blood pressure, or thyroid issues, work with your medical team to keep these conditions well-managed.
• Avoid Harmful Substances: Stop smoking, avoid alcohol, and limit your caffeine intake to no more than 200 milligrams per day (about one 12-ounce cup of coffee).
• Eat a Balanced Diet: Focus on whole foods, plenty of vegetables, lean proteins, and stay hydrated.
• Attend All Appointments: Regular check-ups allow us to monitor your baby’s growth and catch any potential issues early.

How Can We Support You on Your Journey?

Experiencing a miscarriage—or carrying the fear of one—is incredibly difficult. You do not have to carry this emotional weight alone. Every pregnancy is unique, and the statistics we discussed today are just broad numbers. They do not dictate your specific story.

If you have experienced pregnancy loss in the past, or if you are currently pregnant and feeling anxious about your risk factors, getting personalised medical guidance is the best step you can take. We can evaluate your unique medical history, run necessary tests, and build a tailored care plan designed to support a healthy pregnancy.

Your peace of mind matters. If you are looking for compassionate, expert care to guide you through your pregnancy journey, I invite you to book a consultation with our clinic today. Let us work together to safeguard your health and the health of your growing baby.

Book Your Consultation with Dr Supriya Puranik Today