![Maternal physical activity affects yolk sac size and growth in early pregnancy, but girls and boys use different strategies | Scientific Reports Maternal physical activity affects yolk sac size and growth in early pregnancy, but girls and boys use different strategies | Scientific Reports](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41598-023-47536-4/MediaObjects/41598_2023_47536_Fig1_HTML.png)
Maternal physical activity affects yolk sac size and growth in early pregnancy, but girls and boys use different strategies | Scientific Reports
![Is the sac suppose to be empty? This isn't a hate post, I just have never had a scan before 6 weeks of pregnancy so I'm not sure what it's suppose to Is the sac suppose to be empty? This isn't a hate post, I just have never had a scan before 6 weeks of pregnancy so I'm not sure what it's suppose to](https://i.redd.it/86m6r494wk4a1.jpg)
Is the sac suppose to be empty? This isn't a hate post, I just have never had a scan before 6 weeks of pregnancy so I'm not sure what it's suppose to
First ultrasound findings for both cases show small gestational sacs... | Download Scientific Diagram
![Early pregnancy ultrasound measurements and prediction of first trimester pregnancy loss: A logistic model | Scientific Reports Early pregnancy ultrasound measurements and prediction of first trimester pregnancy loss: A logistic model | Scientific Reports](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41598-020-58114-3/MediaObjects/41598_2020_58114_Fig3_HTML.png)
Early pregnancy ultrasound measurements and prediction of first trimester pregnancy loss: A logistic model | Scientific Reports
![a) Original 6-week and 4-day gestational sac image. (b) G.Sac contour... | Download Scientific Diagram a) Original 6-week and 4-day gestational sac image. (b) G.Sac contour... | Download Scientific Diagram](https://www.researchgate.net/publication/325146375/figure/fig4/AS:1086455111778307@1636042492294/a-Original-6-week-and-4-day-gestational-sac-image-b-GSac-contour-formed-using.jpg)