##### Definition:

Gestational diabetes happens during the pregnancy period. This diabetes is characterized by high blood glucose levels and it has a number of characteristics that are different from other forms of diabetes and it is the result of hormonal changes that occur in all women during pregnancy.

#### Formula:

Body Mass Index (BMI) = weight / (height * height)
Ideal Body Weight (IBW) = 45.5+(((height*0.393700787)-60)*2.3)
Adjusted Body Weight (ABW) = IBW + 0.4(actual weight - IBW)
Basal Metabolic Rate = 655.1 + (9.6 * weight) + (1.8 * height) - (4.7 * age)
Calories = BMR * factor
Category | Factor |

None | 1 |

Very little | 1.2 |

1 - 3 days per week | 1.375 |

3 - 5 days per week | 1.55 |

6 days per week | 1.725 |

Every day | 1.9 |

BMI value | Weight gain |

<18.5 | 28-40 lbs |

18.5-24.9 | 25-35 lbs |

25.0-29.9 | 15-25 lbs |

>30 | 11-20 lbs |

##### Example :

A 27 year lady gets pregnant. She weighs 50kgs and her height is 175cm. She does exercises for 3 days per week. Find the calories, BMI, ABW, IBW, weight gain and BMR for her.

##### Given,

age = 27years
height = 175cm
weight = 50kgs

##### To Find,

BMI, IBW, ABW, BMR, Weight gain, Calories

##### Solution

###### Step 1:

Calculate BMI (Body Mass Index) from the given formula,
BMI = weight / (height x height)
BMI = 50 / (1.75 x 1.75)
BMI = 16.3

###### Step 2:

Calculate the IBW (Ideal Body Weight) during pregnancy period.
Ideal Body Weight (IBW) = 45.5+(((height x 0.393700787) - 60) x 2.3)

IBW | = 45.5+(((175 x 0.393700787)-60) x 2.3) |

| = 45.5 + (68.8976 - 60) x 2.3 |

| = 45.5 + (8.8976 x 2.3) |

| = 65.96 |

###### Step 3:

Calculate ABW (Adjusted Body Weight)
(ABW) = IBW + 0.4(actual weight - IBW)

ABW | = 65.96 + 0.4(50 - 65.96) |

| = 65.96 + 0.4(-15.96) |

| = 65.96 - 6.384 |

| = 59.6 |

###### Step 4:

Calculate BMR (Basal Metabolic Rate)
Basal Metabolic Rate = 655.1 + (9.6 x weight) + (1.8 x height) - (4.7 x age)

BMR | = 655.1 + (9.6 x 50) + (1.8 x 175) - (4.7 x 27) |

| = 655.1 + 480 + 315 - 126.9 |

| = 1323.2 |

###### Step 5:

Finally, let us learn how to calculate the Calories level during pregnancy gestational diet.
Calories = BMR x factor

Calories | = 1323.2 x 1.55 |

| = 2051 |