Effects of intravaginal devices containing different dosages of medroxyprogesterone acetate for the control of the estrous cycle in gilts

Use of chorionic gonadotropins during lactation to optimize postpartum sow reproductive performance: a review

“…Despite those promising results, it is important to emphasize that altrenogest, the only progestogen commercially available for use in sows, may be considered costly and labor-intensive since it requires oral supplementation every 24 h ( Haas et al, 2017 ). Intravaginal devices for slow progestogen release, efficiently used to control estrous cycle in ruminants, have been tested in swine by our group ( Gasperin et al, 2011 ; Freling et al, 2013 ; Ulguim et al, 2019 ; Quirino et al, 2020 ; Fiúza et al, 2023 ), but such devices are still not validated for this species and currently not available in the market. Based on the effectiveness of gonadotropins treatment during lactation in inducing ovulation and luteinization, eCG and/or hCG treatment may represent an alternative to synthetic progestagens, which is currently being investigated by our group.…”

Update on artificial insemination: Semen, techniques, and sow fertility

“…Therefore, developing alternatives for daily oral progestogen application is crucial. An intravaginal device impregnated with medroxyprogesterone acetate was recently evaluated in gilts (Quirino et al, 2020; Ulguim et al, 2019). Despite the interesting results, technological adjustments must be performed to improve the reproductive results.…”