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The 1st trimester of your Pregnancy



The 1st trimester of your Pregnancy

1st Trimester Combined Screening

Takes place between the 8th and 13th weeks + 6 days and involves an evaluation of analytical parameters and ultrasound data, which calculate the baby’s risk of presenting chromosomal alterations.

1st Trimester Ultrasound

Carried out between the 11th and 14th weeks and enables calculation of the due date, assessment of the existing foetal structures and screening for deformities.


Expectant mothers should choose clothes that are practical, loose-fitting and adapt to the size of the belly, legs and ankles, to avoid compressing blood vessels and thereby prevent swelling of the lower limbs. Wear a cotton bra that supports the weight and fits breast size, in order to avoid compressing or irritating nipples. Footwear should be comfortable: heels should not be completely flat, with a maximum height of 4 cm.

Physical activity

Physical activity may help you feel better during pregnancy.

• Avoid high impact activities, preferring walks and aquarobics;

• Drink water before and after physical activities.

Consult your physician if you feel any sign of alarm or dizziness, if you feel faint, have difficulty breathing or an irregular heartbeat.

Sexual intercourse

There is no contraindication, provided there are no contractions or blood loss. If you have a history of miscarriage, sexual intercourse should be moderate, especially in the 1st trimester. Your sexual appetite may increase or diminish throughout the pregnancy due to hormonal changes. The couple should share mutual understanding and dialogue.


The notion that pregnant women should “eat for two” is wrong, and the quality of food is more important than the quantity!

• Do not delay breakfast more than 15 to 20 minutes;

• Ingest a variety of foods, fresh and light, avoiding food that is excessively seasoned or rich in fat;

• Avoid excessive consumption of sweets;

• Eat at least 6 to 8 times per day;

• Eat small quantities at each meal;

• Drink at least 1,5 litres of water per day, preferably between meals;

• Sodas are not advised;

• You should ingest approximately 0,5 to 1 litre of milk or dairy products per day;

• Your weight should increase slowly and progressively: in the 1st trimester between 2 and 3 kg and 1,5 kg per month in the 2nd and 3rd Trimesters. At term, the total weight gain should be between 9 and 12 kg;

• If you are not immune to Toxoplasmosis, you should wash your hands carefully before and after preparing food. Meat should be well-cooked, and fruit and vegetables should be washed well.

Discomfort during pregnancy

If you suffer from...

1. Nausea and vomiting;

2. Fatigue or drowsiness;

3. Dizziness and fainting;

4. Breast hypersensitivity;

5. Frequent need to urinate;

6. Vaginal discharge;

7. Pelvic pain, headaches and backache.

What to do?

1. Eat a biscuit at bedtime and when you wake up, chewing well. Spread out meals throughout the day. Avoid environments where smells may provoke nausea. Cook simple meals, avoiding sauces or condiments. Give precedence to solid foods that are not excessively hot;

2. Prolong your sleep period at night and rest for a few moments throughout the day. If you are still tired, inform your physician or nurse;

3. Avoid places that are excessively hot and crowded. Avoid changing position rapidly or too many hours without eating. If you feel dizzy, sit down and place your head between your knees or lie down with your legs elevated;

4. Wear a bra that fits your breast size, with wide straps;

5. Drink plenty of liquids throughout the day and do not retain urine for lengthy periods. Consult your physician if you feel urinary discomfort;

6. Vaginal discharge should be colourless and odourless. Do not use vaginal antiseptics or daily pantyliners;

7. For headaches, take a painkiller prescribed by your physician. Rest is recommended to treat pelvic and back pain.

Warning signs

• Haemorrhages;

• Persistent abdominal pain;

• Fever;

• Repeated contractions that do not subside with rest;

• Loss of amniotic fluid;

• Vaginal discharge with itching or burning;

• Pain or burning during urination;

• Persistent vomiting;

• Excessively swollen face and limbs in the morning.

Your baby’s development

1st to 3rd Week – The egg forms and settles in the uterine wall.

4th Week – The head, torso and outline of the upper and lower limbs are discernible.

8th Week – Weighs approximately 1gr and is the size of a bean.

9th Week – The digestive, respiratory and urinary systems are formed. Skeletal formation begins. The face starts to take shape and the ears, lips, nose and eyes appear.

12th Week – The nails appear and sexual organs are formed. The foetus begins to develop a sucking reflex and opening and closing its hands. The heartbeat can be heard during the consultation and beats at twice the mother’s rate. Weighs approximately 14gr and is the size of a lemon.

The 1st trimester Ultrasound and 1st trimester Screening can be carried out at Clínica de Miraflores, Clínica de Cascais (CascaiShopping), Clínica de Sintra, Clínica de Carcavelos and Clínica Médica de Faro. Appointments can be scheduled by telephone (214 124 300).

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