Jerald S Goldstein et al.
Obstetrics and gynecology, 107(2 Pt 2), 506-508 (2006-02-02)
Spontaneous heterotopic pregnancies are rare, but with assisted reproductive techniques the incidence may approach 1:100. With the widespread use of transvaginal ultrasonography, physicians have attempted treatment of heterotopic pregnancies with minimally invasive procedures such as transvaginal guided potassium chloride (KCl)