1. Uterorelaxing effects of vaginal progesterone: comparison of two methodologies for assessing uterine contraction frequency on ultrasound scans 
Jean-Marc Ayoubi, M.D., Renato Fanchin, M.D., Delphine Kaddouz, M.D., René Frydman, M.D., Dominique de Ziegler, M.D. 
Fertility and Sterility 
Volume 76, Issue 4, Pages (October 2001)
DOI: /S (01)

2. FIGURE 1
Uterine contraction (UC) frequency: Three-dimensional (3D)-derived assessment. UC frequency was assessed daily using a 3D-derived technique from day 15 to day 20 in estrogenized women receiving g of Crinone 4% or 8%, and 2.25 g of Crinone 8% containing 45, 90, and 180 mg of P, respectively.
Ayoubi. Uterorelaxing effects of vaginal progesterone. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )

3. FIGURE 2
Uterine contraction (UC) frequency during the folliculoluteal transition. The results of UC frequency measured on accelerated sequences (×2–5) of images sequences and with the three-dimensional (3D)-derived methodology are comparable.
Ayoubi. Uterorelaxing effects of vaginal progesterone. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )