1.
Allen, G (1981): The twinning and fertility paradox. In (eds): Twin Research 3: Twin Biology and Multiple Pregnancy. New York: Alan R. Liss, Inc., pp 1–13.
2.
Allen, G, Schachter, J (1971): Ease of conception in mothers of twins. Soc Biol
18: 18–27.
3.
Bulmer, MG (1958): The numbers of human multiple births. Ann hum Genet
22: 158–164.
4.
Bulmer, MG (1970): The biology of Twinning in Man, London: Oxford University Press.
5.
Charbonneau, H (1979): Les regimes de fecondité naturelle en Amerique du nord: Bilan et analyse des observations. In Leridon, H, Menken, J (eds): Natural Fertility. Liege, Belgium: Ordina Editions, pp 441–491.
6.
Check, JH, Chase, JS, Adelson, HG, Lauer, C, Schubert, B (1993): A conservative treatment protocol with human menopausal gonadotropins aimed at reducing multiple births. J Perinat Med
21: 315–319.
7.
Chenevix-Trench, G, Healey, S, Martin, NG (1993): Reproductive hormone genes in mothers of spontaneous dizygotic twins: An association study. Hum Genet
91: 118–120.
8.
Eriksson, AW, Fellman, J (1967): Twinning and legitimacy. Hereditas
57: 395–402.
9.
Friedler, S, Mashiach, S, Laufer, N (1992): Births in Israel resulting from in-vitro fertilization/embryo transfer, 1982-1989: National registry of the Israeli association for fertility research. Hum Reprod
7: 1159–1163.
10.
Jongbloet, PH (1993): Discrimination between two competing hypotheses on seasonality of birth in subfecundability traits. Medical Hypotheses
40: 211–216.
11.
Légaré, J (1990): A population register for Canada under the French regime: Context, scope, content, and applications. Can Stud Popul
15: 1–16.
12.
Lloyd, OL, Lloyd, MM, Williams, FLR, Lawson, A (1988): Twinning in human populations and in cattle exposed to air pollution from incinerators. Br J Ind Med
45: 556–560.
13.
Martin, NG (1991): Excessive follicular recruitment and growth in mothers of spontaneous dizygotic twins. Acta Genet Med Gemellol
40: 291–301.
14.
Miura, T, Kawana, H, Nonaka, K (1987): Twinning in New England in the 17-19th centuries. Acta Genet Med Gemellol
36: 355–364.
15.
Miura, T, Nakamura, I, Shimura, M, Nonaka, K, Amau, Y (1984): Twinning rate by month of mother's birth in lapan. Acta Genet Med Gemellol
33: 125–130.
16.
Miura, T, Nonaka, K, Shimura, M, Nakamura, I (1983): A study of the sex ratio of first-born according to the mother's month of birth. Arch Gynecol
233: 263–266.
17.
Miura, T, Shimura, M (1980): The relation between seasonal birth variation and the season of the mother's birth. Arch Gynecol
229: 115–122.
18.
Nakamura, I, Uno, m, Io, Y, Ikeshita, I, Nonaka, K, Miura, T (1990): Seasonality in early loss of one fetus among twin pregnancies. Acta Genet Med Gemellol
39: 339–344.
19.
Nonaka, K, Desjardins, B, Legare, J, Charbonneau, H, Miura, T (1990): Effects of maternal birth season on birth seasonality in the Canadian population during the seventeenth and eighteenth centuries. Hum Biol
62: 701–717.
20.
Nonaka, K, Miura, T (1987): Incidence of twinning in London from 1581 to 1760. Acta Genet Med Gemellol
36: 355–364.
21.
Paraskevaides, EC, Pennington, GW, Naik, S (1988): Seasonal distribution in conceptions achieved by artificial insemination by donor. Br Med I
297: 1309–1310.
22.
Richter, J, Miura, T, Nakamura, I, Nonaka, K (1984): Twinning rates and seasonal changes in Gorlitz, Germany, from 1611-1860. Acta Genet Med Gemellol
33: 121–124.
23.
Weinberg, CR, Moledor, E, Baird, DD, Wilcox, AJ (1994): Is there a seasonal pattern in risk of early pregnancy loss?
Epidemiology
5: 484–489.
24.
Wyshak, G (1969): Intervals between births in families containing one set of twins. J biosoc Sci
1: 337–351.
25.
Wyshak, G, White, C (1969): Fertility of twins and parent of twins. Hum Biol
41: 66–82.