Highlights this week
Baby development at 17 weeks
![baby with thickening umbilical cord baby with thickening umbilical cord](https://web.archive.org./web/20231223043943im_/https://assets.babycenter.com/ims/2018/06/pregnancy-week-17-skeleton_square.png)
Your baby is about the size of a turnip
![baby in body at 17 weeks baby in body at 17 weeks](https://web.archive.org./web/20231223043943im_/https://assets.babycenter.com/ims/2020/12/17-weeks-pregnant-recolored-app.png)
BabyCenter's editorial team is committed to providing the most helpful and trustworthy pregnancy and parenting information in the world. When creating and updating content, we rely on credible sources: respected health organizations, professional groups of doctors and other experts, and published studies in peer-reviewed journals. We believe you should always know the source of the information you're seeing. Learn more about our editorial and medical review policies.
ACOG. 2021. How your fetus grows during pregnancy. American College of Obstetricians and Gynecologists. https://www.acog.org/womens-health/faqs/how-your-fetus-grows-during-pregnancyOpens a new window [Accessed April 2022]
Cleveland Clinic. 2020. Fetal Development: Stages of Growth. https://my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growthOpens a new window [Accessed April 2022]
Mayo Clinic. 2021. Fetal development: The 2nd trimester. https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/fetal-development/art-20046151Opens a new window [Accessed April 2022]
MedlinePlus (ADAM). 2019. Fetal development. https://medlineplus.gov/ency/article/002398.htmOpens a new window [Accessed April 2022]
Hadlock FP et al. 1991. In utero analysis of fetal growth: A sonographic weight standard. Radiology 181 (1). https://pubs.rsna.org/doi/10.1148/radiology.181.1.1887021Opens a new window [Accessed April 2022]
Hadlock FP et al. 1992. Fetal cross-rump length: Reevaluation of relation to menstrual age (5-18 weeks) with high-resolution real-time US. Radiology 182: 5-1-505. https://pubmed.ncbi.nlm.nih.gov/1732970/Opens a new window [Accessed April 2022]
Vintzileos AM et al. 1984. The ultrasound femur length as a predictor of fetal length. Obstetrics & Gynecology 64(6): 779-82. https://pubmed.ncbi.nlm.nih.gov/6390277/Opens a new window [Accessed April 2022]
Hadlock FP 1984. Estimating fetal age: Computer-assisted analysis of multiple fetal growth parameters. Radiology 152: 497-501. https://pubmed.ncbi.nlm.nih.gov/6739822/Opens a new window [Accessed April 2022]