Pregnancy is a life-transforming journey and while there is so much changes that happens during this time, you cannot always be prepared for everything. Here are 10 surprising facts that you did not know were true during pregnancy.

The Nesting Instinct

If you have seen animals look for paper scraps, or take fur out of their own body or collect small twigs and stem to build a nest for their upcoming babies, even if the animals are domesticated, humans do the name. Humans do not take fur or hair out of their body, but we too experience a powerful urge to prepare our home for the baby. We clean it, decorate it and thanks to modern homes, we can now baby proof it do!

Mommy Brain

This happens in the first trimester, when tiredness, morning sickness and other symptoms can make the mother feel worn out and mentally fuzzy, often called the mommy brain. The National Institutes of Health also notes that cognitive function decline in the third trimester of pregnancy, leading to memory problems.

Mood Swings

Premenstrual syndrome (PMS) and pregnancy share several symptoms, such as breast swelling and tenderness, hormonal fluctuations, and mood swings. If you’ve experienced severe mood swings due to PMS, you may notice an intensification of these emotions during pregnancy. It's common to feel joyful one moment and tearful the next as your body adjusts to hormonal changes.

Breast Growth

An increase in breast size is one of the earliest signs of pregnancy apart from your missed period. It happens in the first trimester due to the higher levels of hormones like estrogen and progesterone. The growth continues throughout pregnancy.

Skin Changes

Have you heard about pregnancy glow? This happens because pregnancy women have an increased blood volume, this happens to provide extra blood flow to the uterus and other organs, especially the kidneys. This greater volume brings more blood to the vessels and increases oil gland secretion.

Hair and Nails

During pregnancy, many women notice changes in their hair texture and growth. Hormonal shifts can make hair grow faster and reduce hair loss. However, these changes are typically temporary, and many women experience some hair loss during the postpartum period or after they stop breastfeeding. In some cases, hair growth may also occur in unexpected areas like the face, belly, or around the nipples. Additionally, hair texture can shift, becoming drier or oilier, and some women even notice a change in hair color.

Nails can also undergo changes during pregnancy. Increased hormone levels may cause nails to grow faster and become stronger, but for some women, nails may become more brittle, splitting and breaking more easily. Like hair changes, these nail changes are usually temporary. If your nails are more prone to splitting or tearing, it’s helpful to keep them trimmed and avoid exposure to chemicals in nail polish and nail polish remover.

Your Feet Grow

If you have heard about it, then you already know that it is not just the clothes that do not fit you, it is your shoes too. Extra fluid in the pregnant body also leads to swollen feet. The joints also tend to be looser during pregnancy.

Joint Mobility

Your body also releases hormones like relaxin that prepares your body, especially the cervix for the birth. This loosens the ligament in your body, which may make you less stable .

Varicose veins, constipation, and hemorrhoids

Varicose veins, common in the legs and genital area during pregnancy, result from blood pooling in veins enlarged by pregnancy hormones. They often disappear after delivery. To prevent them, avoid prolonged sitting or standing, wear loose clothing and support hose, and elevate your feet when seated.

Hemorrhoids, which are varicose veins in the rectum, may develop due to increased blood volume and uterine pressure. They can cause pain, itching, bleeding, or stinging, especially during bowel movements. Constipation, caused by hormonal changes and uterine pressure on the large intestine, can worsen hemorrhoids by straining during bowel movements.

Prevent constipation and hemorrhoids by eating a fiber-rich diet, staying hydrated, and exercising regularly. If needed, consult your doctor about stool softeners, laxatives, or creams for relief.

Labor and what goes out of your body

When you are in labor, your amniotic sac, that has fluid that surrounds the baby, breaks or ruptures, which is what is also known as water breaking. For most women contractions start before their water breaks, if not, then the doctor may have to rupture the amniotic sac, in case the cervix is already dilated. Some women may feel the urge to pee, while for some it may feel a trickling their leg.

Pennsylvania’s health department has issued a health alert on congenital measles for the first time in decades as cases rise among pregnant women and newborns.

As of October 19, Pennsylvania had reported 1,286 measles cases across 42 counties, with 247 hospitalizations and six reported deaths. At least 50 pregnant women have reportedly been affected.

At least one death has been linked to congenital measles. The first death reported in the current outbreak was that of a newborn boy who died immediately after birth while his mother was severely ill with measles.

The health department said the outbreak had raised concerns about congenital measles, which has not been identified in the state for decades. The alert provides clinical guidance on managing measles during pregnancy and in newborns.

Decades of MMR vaccination meant many doctors had never encountered such cases. However, declining vaccination rates have allowed measles to spread in under-vaccinated communities.

Nationwide, 4,410 confirmed measles cases had been reported as of October 15, according to the US Centers for Disease Control and Prevention (CDC). Of these, 96% were in unvaccinated people.

Also read: What Happens After Measles Infection? The Hidden Risks That Can Last For Years

What Is Congenital Measles?

Congenital measles occurs when a pregnant woman contracts measles and transmits the virus to her fetus through the placenta.

According to the American College of Obstetricians and Gynecologists (ACOG), newborns with clinical or laboratory evidence of measles within the first 10 days of life following exposure in the womb are considered to have congenital measles.

Historical reports suggest that transmission occurs in approximately 25% to 30% of cases when the mother develops measles in the days before delivery, although data are limited.

What Happens to Babies With Congenital Measles?

Congenital measles can range from an asymptomatic infection to severe disease and death, according to ACOG. Symptoms may include fever, rash and jaundice. Complications can include pneumonia, low platelet counts and neurological problems. The rash may appear late, look different or be absent.

Can Congenital Measles Be Fatal? What To Watch For In Newborns?

Read More: Measles Cases Are Rising in US—Who Should Get A Booster Shot?

Before immune globulin became widely used, congenital measles mortality was reported to be as high as 30%.

Affected newborns also face an increased risk of subacute sclerosing panencephalitis (SSPE), a rare, fatal brain disease that can develop months to years after infection.

ACOG advises considering newborns at risk of symptomatic, transmissible measles if they are born after maternal symptoms begin and up to 14 days after the mother's rash onset.

Asymptomatic newborns who initially test negative may be considered for repeat testing on day 10 of life to check for infection acquired in the womb.

How Can Parents Protect Their Babies From Measles?

MMR vaccination before pregnancy is the best way to prevent measles during pregnancy and reduce the risk of congenital measles.

Women without evidence of immunity should receive at least one MMR dose in non-outbreak settings and two doses at least 28 days apart during outbreaks.

Because MMR is a live vaccine, it should not be given during pregnancy. Women should avoid pregnancy for 28 days after vaccination.

Pregnant women who may have been exposed to measles or are unsure of their immunity should promptly contact their healthcare provider.

The pertussis vaccine, which protects against whooping cough (Bordetella pertussis), a highly contagious bacterial respiratory infection, offers strong protection in young children, according to a new study led by the US Centers for Disease Control and Prevention (CDC).

Published in the CDC’s Morbidity and Mortality Weekly Report (MMWR), the study found that children who received three or more doses of the diphtheria, tetanus, and acellular pertussis (DTaP) vaccine had 96.2% protection against laboratory-confirmed pertussis.

Pertussis Vaccine Offers Strong Protection

The DTaP vaccine is administered in a five-dose childhood series. The first dose is given at 2 months of age, followed by doses during infancy and early childhood. The final dose is recommended between ages 4 and 6 years.

The MMWR study compared children in Alaska who had received three or more DTaP doses with those who were unvaccinated or had received fewer doses than recommended.

Unvaccinated children had approximately 26 times the odds of developing laboratory-confirmed whooping cough compared with vaccinated children.

Overall, adjusted vaccine effectiveness against pertussis was 96.2% among children who had received three or more DTaP doses. Partial vaccination also offered protection, with effectiveness reaching 85.3% among children who had received one or two doses.

“Pertussis vaccination is effective in preventing laboratory-confirmed pertussis in young children,” said corresponding author Joseph McLaughlin of the Section of Epidemiology, Alaska Department of Health, Anchorage.

Also read: RSV Warning: Welsh Mum Urges Pregnant Women To Get Vaccine After Baby Nearly Dies

Whooping Cough Can Cause Severe Complications

Pertussis can cause serious complications in young children, including pneumonia, pauses in breathing (apnea), seizures, brain damage, and death. Severe coughing fits can also trigger vomiting and, in some cases, fractured ribs.

Infants younger than 6 months are particularly vulnerable because their immune systems are still developing. Babies may not develop the characteristic “whoop” sound and can instead experience feeding difficulties or pauses in breathing, making the infection harder to recognize.

According to a provisional CDC report, 16 people died from pertussis in the United States in 2025, including 10 infants.

Whooping cough spreads through respiratory droplets and can affect people of any age. However, newborns and people who are not adequately vaccinated face a greater risk of severe illness.

Previous research has also found that unvaccinated children are more likely to develop severe illness or require hospitalization than vaccinated children.

Childhood Vaccination Rates Have Declined In The US

Read More: US Kindergarten Vaccination Rates Decline, Exemptions Rise as Measles Cases Hit 35-Year High

Despite the protection offered by vaccination, DTaP coverage among US kindergartners has declined in recent years.

CDC data show that coverage fell to 92% in the 2025–26 school year, down from 95.2% in 2017–18.

The findings underscore the importance of maintaining high childhood vaccination coverage to reduce pertussis infections and protect children against severe illness and death.

Identifying Whooping Cough Symptoms

Whooping cough often begins with cold-like symptoms, including a runny nose, sneezing, a mild cough, and sometimes a low-grade fever. After one to two weeks, coughing fits may become more severe and persistent.

The cough can be followed by a characteristic whooping sound as the person gasps for air. Vomiting after coughing fits can also occur. However, symptoms vary, particularly in infants, who may experience breathing difficulties without a typical cough.

Diagnosis may involve laboratory testing of a nasal or throat sample. Early recognition is especially important in infants because the infection can progress to serious complications.

Herpes simplex virus (HSV), which commonly causes cold sores, usually causes mild symptoms in adults but can be life-threatening in newborns, whose immune systems are still developing.

Meg Edmonds, from Staffordshire, UK, lost her 10-day-old daughter, Magnolia, to HSV in February.

“We didn't know a cold sore could kill a baby,” Meg told the BBC. She is now urging parents to learn about the risks cold sores pose to newborns.

The virus is suspected to have been passed on to Magnolia by her mother.

“The guilt is obviously unbearable; it's horrific, but I just try and remind myself that I didn't know and I did what I could have done with the knowledge that I did have,” Meg said.

Mother Did Not Know Cold Sores Could Endanger Newborns

Also read: Rare Pregnancy Infections Linked To 3-Fold Higher Autism Risk: What Is TORCH?

The 22-year-old said Magnolia was born “perfectly healthy” after what she described as a straightforward “water birth”.

Only later did Meg realise she had a sore on her lip around the time of the birth.

“Looking back at photos now, I can see that I had a lesion or sore on my lip whilst I was giving birth which I thought nothing of at the time,” she said.

Meg, who had never experienced a cold sore before, sought advice from health professionals but was reassured that the sore was nothing to worry about.

“They just thought that I might need to drink more or that it might just have been hormonal from giving birth only the day prior, so I thought nothing of it,” she said.

Magnolia's condition later deteriorated, and she died from HSV, according to the report.

Cold Sore Outbreak Brings Back Painful Memories

Meg said she had avoided visitors who were unwell, never kissed Magnolia and washed her hands frequently to protect her newborn from infections.

“I washed my hands constantly because I was worried in general about infections. But I never knew that if that passed to her it could kill her,” she said.

A subsequent cold sore outbreak brought back painful memories.

“I'm constantly reminded anyway that my daughter isn't here any more and why that is, but to actually have a physical reminder on my face is horrible,” she said.

How To Protect Newborns From HSV

Read More: Baby Not Sitting by 9 Months? Warning Signs Parents Should Know

According to the UK's National Health Service (NHS), newborns are particularly vulnerable to HSV, especially during the first six weeks of life. The infection can affect the eyes, mouth and skin or spread to other organs, potentially becoming life-threatening.

HSV can spread after birth through contact with a cold sore, including when someone with an active cold sore kisses a baby. It can also spread through herpes blisters on the breast during breastfeeding.

The NHS recommends these precautions to reduce the risk of infection:

• Wash hands: Wash hands thoroughly before handling a newborn.
• Avoid kissing: People with an active cold sore should not kiss a baby.
• Prevent direct contact: Keep cold sores and other herpes lesions away from the baby.
• Take care during breastfeeding: Do not breastfeed from a breast with herpes blisters until they have healed. Seek medical advice about feeding and expressed milk from the affected breast.
• Inform healthcare professionals: Pregnant women with a history of genital herpes or symptoms of a possible infection should inform their doctor or midwife.

Warning Signs Of Neonatal Herpes

Babies may not develop visible blisters, and neonatal herpes can progress rapidly. Seek urgent medical attention if a newborn has:

• Unusual irritability or difficulty settling.
• Poor feeding or feeds less than usual.
• A fever of 38°C or higher.
• A rash or sores on the skin, eyes or inside the mouth.
• Unusual lethargy, floppiness or difficulty waking.
• Breathing difficulties or seizures.