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Pregnancy triggers various cardiovascular changes. During gestation, your blood pressure dips in the mid-term and quickly shoots up. It's important to track its patterns to catch unpredictable issues. Pregnancy blood pressure tests show signals that might turn into hypertensive disorders like chronic hypertension, preeclampsia, and gestational hypertension. This increases the risk for maternal stroke, pulmonary oedema, renal failure, and placental abruption.
Pregnancy Blood Pressure
Blood pressure reveals how the cardiovascular system adapts to the increase in blood volume and hormonal shifts. During pregnancy, your body is doing more than it normally does in a non-pregnant state. The body actively supplies oxygen and nutrients to the growing baby through the placenta. Blood pressure is captured in millimetres of mercury (mmHg).
Pregnancy blood pressure helps identify future threats that could complicate pregnancy and maternal deaths. Blood pressure shows how well the blood circulation pushes against the artery walls as the heart pumps it through the body. Blood pressure has two numbers, systolic and diastolic, which tell her that her cardiovascular system is working.
- Systolic: The top number tells the pressure in your arteries when the heart contracts and squeezes blood out. It's typically 110-120 mmHg in early pregnancy. During pregnancy, this pressure affects how well blood reaches the placenta.
- Diastolic: The bottom number tells the resting pressure when your heart relaxes between beats. It's typically 79-80 mmHg in normal times. It shows how blood vessels cope with increased blood flow during pregnancy.
Pregnancy blood pressure is different from regular pressure because of the countless changes happening inside your body. During pregnancy, expectant mothers' blood volume increases, blood vessels relax due to hormonal influences, and the heart works more to meet the demands. In the first and mid-trimester, blood pressure often drops and may rise again in the later trimester. These shifts are normal to expect during pregnancy.
Why Blood Pressure is Checked at Every Prenatal Visit
When blood pressure rises abnormally, it means that the blood vessels are not able to adapt if the placenta is not functioning well. This is why doctors monitor blood pressure closely during pregnancy. High blood pressure does not just disturb the mother's organs; it also reduces blood flow to the baby and hinders growth and development. High blood pressure disorders are one of the leading causes of maternal and foetal complications.
Pregnancy Blood Pressure Changes Rapidly
Pregnancy blood pressure can change from week to week rapidly. During pregnancy, the body has to work extra hard to meet the increasing demands.
- As the placenta grows, it requires a steady supply of blood.
- Pregnancy hormones relax and widen the blood vessels, which changes their resistance and flow.
- Blood volume expands, and fluid retention is also common during pregnancy.
Poor sleep, stress, dehydration, and physical discomfort can cause temporary fluctuations in blood pressure. This is why doctors don't rely on a single reading. Pregnancy conditions like gestational hypertension and preeclampsia grow gradually, and regular checkups help spot the changes.
Early Detection Matters
High blood pressure can cause serious complications if it goes unnoticed. Tracking blood pressure, monitoring the patterns closely, and changing lifestyle accordingly, helps reduce or avoid the risks. Even a slight increase shows that the body is struggling to cope with the demands of pregnancy.
Unchecked high blood pressure increases the risk of:
- Preeclampsia: It can affect multiple organs if unnoticed.
- Preterm Birth: Sometimes it's important to safeguard a mother's life.
- Placental Insufficiency: High blood pressure interrupts the nutrition delivery, and the baby receives less oxygen and nutrients than it needs.
- Stillbirth: Extreme high pressure, which can't be treated, can lead to stillbirth.
High Pregnancy Blood Pressure Doesn't Show Symptoms
Sometimes during pregnancy, high blood pressure doesn't show any symptoms that signal high blood pressure. Many pregnant women might assume severe headaches, swelling, dizziness and pain as normal pregnancy symptoms. High and dangerous blood pressure can come with no noticeable symptoms, and you may feel fine, active and energetic.
This may start to affect internal organs when the blood flow to the placenta is reduced. By that time, the situation might go out of hand and require immediate intervention to save the mother's health. Checking blood pressure at every prenatal visit helps identify risks even before it starts sending signals.
Blood Pressure and Organ Health
During pregnancy, blood pressure is more important than heart health. It also involves other systems that are functioning together. Increased blood pressure shows:
- Stress on the kidneys, which play a crucial role in regulating fluids and filtering waste.
- Indicate changes in the blood vessels and show that they are not adapting to the increased blood volume.
- It also shows the issues with the placenta, which is crucial for nourishing and oxygenating the baby.
Checking pregnancy blood pressure at every prenatal visit ensures the blood vessels are adapting to the raised blood volume. Most people misunderstand that blood pressure comes with age or pre-existing conditions. But high blood pressure disorders can come at any time, even in a low-risk pregnancy. Even if the woman is active, young, and healthy, preeclampsia is common in the first pregnancy.
Genetics also play a role. Even if you are healthy and active, your family history might increase blood pressure during pregnancy. This is the reason why doctors check blood pressure every time you go for a prenatal visit. Detecting issues early makes it easy to manage and protect the health of both the mother and the baby.
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FAQs on Pregnancy Blood Pressure: Why Blood Pressure is Checked at Every Prenatal Visit
- What is a normal blood pressure for a pregnant woman?
Normal blood pressure during pregnancy is held at 120/80 mmHg. During pregnancy, it can drop below the normal level in the second trimester due to hormonal changes. If the BP is at 140/90 mmHg or higher, it can indicate high blood pressure or hypertension. - What happens if BP is 140/90 in pregnancy?
Blood pressure 140/90 mmHg can indicate high blood pressure. It can signal gestational hypertension or preeclampsia. Unchecked or untreated hypertension can increase the risk of preterm birth, low birth weight, or placental issues.