Small Babies

Question 1

What is the most accurate method of estimating gestational age?

Answer 1

Ultrasound undertaken before 20 weeks gestation

- Most reliable using crown to rump length between 8 and 14 weeks and head circumference between weeks 15-20

Question 2

How long after the date of the start of the last menstrual period (LMP) is the estimated date of delivery?

Answer 2

• 40 weeks after LMP

Question 3

What is small for gestational age (SGA)?

Answer 3

Fetus or baby with BW or estimated weight that is either:

• 2 SD from the mean for GA
• Under the 10th percentile

Question 4

What is an Intrauterine growth restriction (AKA Fetal growth restriction)?

Answer 4

• Fetus which fails to meet its growth potential because of genetic or environmental factors

Question 5

What is defined as low birth weight (LBW)?

Answer 5

• Less than 2500g

Question 6

What is defined as very low birth weight (VLBW)?

Answer 6

• Less than 1500g

Question 7

A small baby is born to small parents this is most likely due to SGA or IUGR?

Answer 7

• Small for gestational age. Child growing to genetic potential which just happens to be smaller than reference population

Question 8

Three broad categories (factors) affecting fetal growth are?

Answer 8

• Fetal factors
• Maternal factors
• Placental factors

Question 9

What are some risk factors for having a SGA baby?

Answer 9

• Age > 40
• Smoke > 10 cig/day
• cocaine use
• previous SGA baby
• previous stillborn
• chronic HTN
• DM with vascular Dx
• Renal impairment
• antiphospholipid syndrome
• Threatened miscarriage
• Pre-eclampsia
• Placental abruption
• Unexplained antepartum hemorrhage

Question 10

The uterus should reach the height of the umbilicus by how many weeks gestation?

Answer 10

20-24 weeks

Question 11

The uterus will reach the xiphoid process by how many weeks?

Answer 11

36 weeks

Question 12

Following 26 weeks, the symphysis-fundal height will be roughly equivalent to what?

Answer 12

• The number of weeks gestation

Question 13

Problems occurring in early pregnancy will cause symmetric or asymmetric growth?

Answer 13

• Symmetric
• Brain development occurs in early pregnancy if issue is in early pregnacy this is affected.
• If in late pregnancy Brain development complete and only abdominal growth will be affected