13 week pregnant.

Just 13 weeks ago, you might have found yourself grappling with the realization of your pregnancy. And now, behold! Look at how far you’ve come! 

Along the way, you may have encountered some challenging moments and navigated through a few difficult situations. Still, here you are, entering the last few days of your first trimester with resilience! 

As you reach week 13, your precious baby is bustling with activity, and your journey is filled with numerous developments.

To know more about what 13 week pregnancy brings your way, continue reading. 

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13 Week Pregnant – Baby Development

Here are the key developments taking place in your baby’s growth at 13 weeks pregnant:

  • By week 13, your baby is the size of a pea pod, measuring over 2.8 inches from the top of their head to the coccyx and weighing around 25 grams.
  • Hair follicles have started developing, and fine hair called lanugo is appearing. 
  • Your baby is now capable of swallowing and consuming the surrounding amniotic fluid.
  • The baby’s bladder is visible through ultrasound, and the kidneys produce urine that becomes part of the amniotic fluid.
  • Ten tiny fingertips develop unique ridges, eventually forming the baby’s everlasting fingerprints. 
  • The placenta plays a critical role in providing oxygen and nutrients to the baby, as well as filtering out waste. While it is already fully functional, it continues to grow and undergo changes throughout the pregnancy.

13 Weeks Pregnant In Months

At 13 weeks pregnant, you’ve reached the final week of the first trimester. While doctors primarily track pregnancy by weeks rather than months, you can consider yourself three months pregnant at this stage.

13 Weeks Pregnant Belly

At 13 weeks pregnant, your belly size may vary depending on factors such as your body shape, muscle tone, and whether it’s your first pregnancy. However, on average, your belly may start to show slightly rounding or fullness.

Related Blog: 8 Surprising Things Unborn Babies Usually Do In The Womb

13 Weeks Pregnant Symptoms

  • Vaginal Discharge

Increased white or clear vaginal discharge (leukorrhea) is common during pregnancy, appearing as a thin, whitish fluid.

  • Stretch Marks

Around 50-90% of expectant parents develop stretch marks, purple or red lines on the belly, breasts, or thighs that fade into pale lines over time. 

  • Visible Veins

Increased blood flow may cause visible veins, such as blue streaks and spider veins, to appear under the skin.

  • Increase in Energy

The second trimester is often associated with a surge in energy and fewer symptoms. You may feel more like yourself and have the motivation to accomplish tasks on your to-do list.

  • Increased Sex Drive

Some pregnant women experience a heightened sex drive at 13 weeks due to hormonal changes. 

  • Round Ligament Pain

As your uterus grows rapidly, you may feel sharp lower abdominal pains, known as round ligament pain, when you move or change positions quickly.

  • Leaky Breasts

Changes in your breasts occur during pregnancy, including the production of colostrum, a thick and sticky precursor to breast milk. 

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13 Weeks Pregnant – Tips to Follow

  • Take Your Prenatal Vitamin

Ensure you take your prenatal vitamin daily, as it provides critical vitamins and minerals for your baby’s development. 

  • Watch Portion Sizes

If constipation is a concern, opt for smaller, frequent meals instead of large ones to ease digestion and minimize discomfort.

  • Get Enough Calcium

Include calcium-rich foods like milk, fortified juice, almonds, sesame seeds, soy products, green leafy vegetables, canned salmon, and broccoli in your diet.

  • Eat Iron-Rich Foods

Iron supports blood supply, an essential need during pregnancy. Consume iron-rich foods such as beef, duck, soy products, spinach, dried fruits, and potatoes with the skins on. 

  • Embrace Your Sex Drive

As you enter the second trimester, you may experience an increase in your sex drive. Enjoy its benefits, such as improved sleep, mood, and pelvic floor muscle strength.

  • Buy Comfortable Clothes

Look for maternity clothes that provide room for your growing belly while keeping you comfortable and confident.

  • Fight Off A Cold

Pregnancy makes you more susceptible to colds, and many cold medications are not recommended. Stay hydrated with warm beverages, like ginger tea and chicken broth.

13 Weeks Pregnant Ultrasound – Do You Need One?

An ultrasound at 13 weeks offers valuable insights into your baby’s development. Their kidneys are functioning, and the urinary tract system allows them to start peeing in the uterus. It also helps assess the growth and development of other organs. This scan provides crucial information about your baby’s overall health and well-being.

Takeaway at Thirteen Weeks Pregnant

At thirteen weeks pregnant, you’re entering the second trimester, a time of exciting changes and growth for you and your baby. You may start to experience a decrease in nausea and the occurrence of stretch marks, visible veins, and leaky breasts. Remember to take prenatal vitamins and eat healthy foods as your baby grows. 

If you need professional guidance or have questions, Queen’s Gynecology is here to support you. From routine check-ups to specialized services, we prioritize your well-being and your baby’s health.

Related Blog10 Week Pregnant: Symptoms, Tips and Baby Development


At 13 weeks pregnant, your baby is developing rapidly. They’re the size of a pea pod, with hair follicles and the ability to swallow amniotic fluid. Symptoms like increased vaginal discharge, stretch marks, and visible veins may occur. Take your prenatal vitamin, watch portion sizes, and incorporate calcium and iron-rich foods in your diet. Embrace your sex drive and buy comfortable maternity clothes. Your doctor may advise an ultrasound at this stage to monitor your baby’s development. Remember, your doctor is there to guide and support you throughout your pregnancy, so don’t hesitate to reach out for any problems or questions.


Pregnancy Symptoms

Tips and Advice

Baby Development

Week 1

– Missed period

– Take a home pregnancy test

– Fertilization occurs

Week 2

– Tender breasts

– Begin taking prenatal vitamins

– Blastocyst implants in the uterus

Week 3

– Fatigue

– Schedule your first prenatal visit

– Embryonic development begins

Week 4

– Morning sickness starts

– Avoid alcohol, smoking, and caffeine

– Neural tube forms

Week 5

– Increased urination

– Eat a balanced diet

– Heart starts beating

Week 6

– Mood swings

– Stay hydrated

– Brain and head development

Week 7

– Constipation

– Start gentle exercise

– Limb buds form

Week 8

– Food cravings

– Get plenty of rest

– Webbed fingers and toes develop

Week 9

– Weight gain begins

– Avoid raw or undercooked foods

– Tail disappears, now considered a fetus

Week 10

– Visible baby bump

– Wear comfortable clothing

– Organs continue to develop

Week 11

– Darkened areolas

– Practice relaxation techniques

– Baby can swallow and produce urine

Week 12

– Reduced nausea

– Consider prenatal classes

– Sex organs distinguishable

Week 13

– Increased energy

– Continue regular check-ups

– Baby’s fingerprints form

Week 14

– Less frequent urination

– Plan for maternity leave

– Baby’s facial muscles develop

Week 15

– Quickening (baby moves)

– Do pelvic floor exercises

– Baby can make facial expressions

Week 16

– Round ligament pain

– Stay active with low-impact exercises

– Develops sense of hearing

Week 17

– Nasal congestion

– Consider a prenatal massage

– Baby’s skeleton starts hardening

Week 18

– Belly button changes

– Stay well-hydrated

– Vernix caseosa covers the skin

Week 19

– Braxton Hicks contractions

– Eat small, frequent meals

– Baby’s kicks become stronger

Week 20

– Leg cramps

– Begin monitoring baby’s movements

– Baby is covered in lanugo (fine hair)

Week 21

– Shortness of breath

– Sleep on your side

– Eyebrows and eyelashes appear

Week 22

– Linea nigra (skin darkens)

– Practice relaxation techniques

– Rapid brain development

Week 23

– Backache

– Consider prenatal yoga or swimming

– Baby can recognize your voice

Week 24

– Swollen ankles

– Elevate feet when sitting or lying

– Lungs continue to mature

Week 25

– Increased appetite

– Continue regular prenatal check-ups

– Baby may respond to loud noises

Week 26

– Heartburn

– Sleep with extra pillows for support

– Eyes open for the first time

Week 27

– Braxton Hicks intensify

– Pack your hospital bag

– Baby can hiccup

Week 28

– Trouble sleeping

– Monitor blood pressure

– Baby’s kicks become more regular

Week 29

– Shortness of breath

– Avoid lifting heavy objects

– Baby’s bones fully developed

Week 30

– Swollen hands

– Stay hydrated and avoid salt

– Baby may be head-down in preparation for birth

Week 31

– Increased vaginal discharge

– Take childbirth classes

– Baby’s immune system develops

Week 32

– Hemorrhoids

– Practice perineal massage

– Baby’s toenails and fingernails grow

Week 33

– Trouble finding a comfortable position to sleep

– Rest and nap when possible

– Baby’s bones start to harden further

Week 34

– Frequent urination

– Prepare for maternity leave

– Baby’s central nervous system matures

Week 35

– Braxton Hicks increase

– Avoid prolonged standing or sitting

– Baby’s skin becomes less wrinkled

Week 36

– Pelvic pressure

– Finalize birth plan

– Baby continues to gain weight

Week 37

– Lightening (baby drops)

– Stay active with walking

– Baby’s head positions for birth

Week 38

– Fatigue increases

– Do pelvic exercises

– Baby’s lungs are fully mature

Week 39

– Cervix effacement

– Rest and conserve energy

– Baby’s immune system continues to develop

Week 40

– Contractions begin

– Monitor contractions

– Baby’s digestive system is ready for breast milk

Week 41

– Dilation of cervix

– Stay calm and patient during labor

– Baby’s head molds to fit through the birth canal

Please note that every pregnancy is unique, and symptoms and developments may vary from person to person. Always consult with a healthcare professional for personalized advice and care during pregnancy.

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