Fig. 1

*Core = PICO framework (Population, Intervention, Control, Outcomes). Thirteen studies reported pregnancy complications and obstetric outcomes (O) in women with stage III–IV endometriosis (P) who had undergone surgical intervention (I), compared with women managed conservatively or women without endometriosis (C). Benaglia et al. [11], Farella et al. [12], Lapointe et al. [13], Miura et al. [14], Nirgianakis et al. [15], Ono et al. [16], Porpora et al. [17], Salamun et al. [18], Schliep et al. [19], Thomin et al. [20], Tuominen et al. [21], Uchida et al. [22], Mooney et al. [10]