Table 1 Serum APN values of each group during natural process (n = 7, \(\overline{x}\) ± s, unit: ng/ml)

59.085 ± 9.731

55.800 ± 10.498

56.586 ± 7.815

54.329 ± 5.915

55.129 ± 7.319

57.957 ± 13.696

47.857 ± 10.195

52.157 ± 4.433

48.985 ± 3.831

47.157 ± 1.988

82.071 ± 15.730

75.129 ± 6.176^*

37.800 ± 4.699^*

37.629 ± 3.375^*

33.271 ± 6.205^*

68.486 ± 18.038

46.243 ± 8.234

45.829 ± 8.907

31.657 ± 8.372^*

31.143 ± 5.482^*