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 1st Pregnancy Trimester

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Pregnancy Calculator

Find changes in your body and fetus development in different trimesters of pregnancy, how the fetus grow and develop inside womb in different trimesters, find length, weight and how fetus looks in different trimesters of your pregnancy.

Please select the Pregnancy Trimester ...
Trimester:   




Note: Information provided on this page is for reference only, please seek medical assistance when in doubt

First trimester begins at day 1 of your last menstrual cycle till week 12. During the first trimester of pregnancy, the woman undergoes many physiological and hormonal changes, including cardiovascular, hematologic, metabolic, renal and respiratory changes. This changes occurs in your body to ensure the fetus is provided for blood sugar, breathing and cardiac output. Levels of progesterone and oestrogens rise continually throughout pregnancy, suppressing the hypothalamic axis and subsequently the menstrual cycle. Hormonal changes affect almost every organ system in your body.

Other noticeable changes you may experience:

  • Extreme tiredness
  • Tender and/or swollen breasts, your nipples might also stick out.
  • Upset stomach with or without throwing up (morning sickness)
  • Cravings or distaste for certain foods
  • Mood swings
  • Constipation (trouble having bowel movements)
  • Need to pass urine more often
  • Headache
  • Heartburn
  • Weight gain or loss
With changes in your body, you might need to make changes to your daily routine, such as going to bed earlier or eating frequent small meals. Fortunately, most of these discomforts will go away as your pregnancy progresses.


Baby growth in first trimester

At 4 weeks:
  • Baby's brain and spinal cord have begun to form.
  • Heart begins to form.
  • Arm and leg buds appear.
  • Your baby is now an embryo and one-twenty-fifth inch long.

At 8 weeks:
  • All major organs and external body structures have begun to form.
  • Baby's heart beats with a regular rhythm.
  • Arms and legs grow longer, and fingers and toes have begun to form.
  • Umbilical cord is clearly visible.
  • Eyes have moved forward on the face and eyelids have formed.
  • Sex organs begin to form.
  • At the end of eight weeks, baby looks more like a human nearly 1 inch long and weighs less than one-eighth ounce.

At 12 weeks:
  • The nerves and muscles begin to work together.
  • Your baby can make a fist.
  • Eyelids close to protect the developing eyes; however eyelids do not open until the 28 th week.
  • External sex organ shows up and boy or girl baby is distinguishable.
  • Growth of head has slowed, and your baby is now much longer about 3 inches long, and weighs almost an ounce.

 Next Trimester ► 
Pregnancy Trimesters
»  First Trimester
»  Second Trimester
»  Third Trimester
Fetal Growth in ...
1st month 2nd month 3rd month 4th month
5th month 6th month 7th month 8th month
9th month 10th month
Fetal Growth in ...
Week 1 Week 2 Week 3 Week 4 Week 5 Week 6
Week 7 Week 8 Week 9 Week 10 Week 11 Week 12
Week 13 Week 14 Week 15 Week 16 Week 17 Week 18
Week 19 Week 20 Week 21 Week 22 Week 23 Week 24
Week 25 Week 26 Week 27 Week 28 Week 29 Week 30
Week 31 Week 32 Week 33 Week 34 Week 35 Week 36
Week 37 Week 38 Week 39 Week 40 Beyond 40 weeks


Also see...
»   Due Date Calculator
»   When is Ovulation (Ovulation Calculator)
»   Pregnancy Calculator
»   Safe Period Calculator
»   Fetal Growth Calculator
»   Fetal Size Calculator
»   Pregnancy Weeks
»   Pregnancy Months
»   Baby Growth Calculator
»   Baby Name Search
»   Find Your Star Sign
»   Find Your Lucky Number
»   Birth Control Overview
»   Birth Control FAQs
»   Birth Control Methods
»   Birth Control Contraceptives
»   Blood Sugar Conversion
»   Find Calories in different food items
»   BMI Calculator (Body Mass Index)
»   Body Fat Calculator
»   BMR Calculator (Find daily calorie requirement)
»   Waist to Hip Ratio Calculator
»   Calculate Calories Burned in different activities
»   Calculate Your Ideal Weight
»   Weight Management
»   Cloth size Conversion
»   Shoe Size Conversion
»   World Time - Find time at different places
»   Distance between Cities (or Town)
»   Calendar Creator
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List of Supported Conversion Types ...
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PowerPrefixPressureRadiation
Radiation AbsorbedRadiation ExposureRadioactivityShoe Size
SoundSpecific VolumeSpeedSurface Charge Density
Surface Current DensitySurface TensionTemperatureThermal Conductivity
Thermal ExpansionThermal ResistanceTimeTorque
VolumeVolume Charge DensityWater Oil ViscosityWeight

 

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