子宮腔上1/2 vs. 子宮腔下1/2
懷孕率並無明顯差異
http://humrep.oxfordjournals.org/content/19/8/1785.full
Figure 2.
Higher transfer: ultrasound-guided embryo transfer showing the tip of the catheter (arrowhead) inserted into the uterine cavity at a distance of 13 mm from the fundal endometrial surface.
Figure 3.
Lower transfer: ultrasound-guided embryo transfer showing the tip of the catheter (arrowhead) inserted into the uterine cavity at a distance of 17 mm from the fundal endometrial surface.
Best site for embryo transfer: the upper or lower half of endometrial cavity?
Table III.
Upper half × lower half: rates of implantation, clinical pregnancy, spontaneous abortion (≤12 weeks), ectopic pregnancy and ongoing pregnancy in the two groups studied
| Group I: upper half | Group II: lower half | P | |
|---|---|---|---|
| Implantation rate | 16.0% (89/555) | 16.4% (87/530) | 0.86 |
| Pregnancy rate/transfer | 35.0% (70/200) | 29.5% (59/200) | 0.28 |
| Miscarriage rate | 15.7% (11/70) | 15.2% (9/59) | 1.00 |
| Ectopic pregnancy rate | 1.4% (1/70) | − (0/59) | 1.00 |
| Ongoing pregnancy rate | 29% (58/200) | 25% (50/200) | 0.43 |
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