85 - 257 days
||Rat Rattus norvegicus
||Teerds KJ, De Rooij DG, Rommerts FF, van der Tweel I, Wensing CJ. Turnover time of Leydig cells and other interstitial cells in testes of adult rats. Arch Androl. 1989 23(2):105-11 abstract, p.107 3rd paragraph & p.109 4th paragraphPubMed ID2589905
||P.107 3rd paragraph: "The percentage of labeled peritubular cells during [3H]thymidine treatment was always
higher than the percentage of labeled Leydig cells (Table 1). After the linear regression analysis and arcsin transformation (hypotheses of linearity and regression not rejected), it could be calculated that 126 days (95 % confidence interval, 85 to 257 days) would pass before all cells had become labeled."
||Abstract: "The calculated turnover time for the peritubular cells was 85 to 257 days." P.109 4th paragraph: "The turnover time of peritubular cells
ranges from 85 to 257 days, which was more rapid than the turnover time of Leydig cells."