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Table 1 Demographic information of patients and laboratory outcomes

From: The effects of daily meteorological perturbation on pregnancy outcome: follow-up of a cohort of young women undergoing IVF treatment

CharacteristicsSpring (n = 255)Summer (n = 241)Autumn (n = 194)Winter (n = 170)P
Fertilization methoda
 IVF (n)13413910281NS
 Other (n)c1211029289
Age (year)b32(31–34)32(31–34)32(31–33)32(31–34)NS
Gn dose (IU), totalb2700(2250–3600)2700(2250–3600)2700(2250–3600)2887.5(2250–3750)NS
Stimulation period (day)b11(10–12)11(10–12)11(10–12)11(10–12)NS
LH baselineb, d1.9(1.2–3.0)2.1(1.3–3.2)1.8(1.2–2.8)1.8(1.2–2.5)NS
LH at triggerb, d2.2(1.4–3.3)2.2(1.5–3.5)2.1(1.4–3.1)1.8(1.3–2.7)NS
E2 baselineb, d53(44–77.8)55(44–85)49(44–71.8)49(44–73.8)NS
E2 at triggerb, d12,706(8042–21,297)11,556.5(7970.3–17,127.5)11,316(7834.3–17,988.3)10,576(6598.8–17,395)NS
Day3 FSHb, d6.9(5.9–8.1)6.9(5.8–7.9)6.8(5.8–7.9)6.9(6.3–8)NS
Infertility diagnosisa
 Tubal factor13313210785NS
 Pelvic Adhesions1101109062NS
 Uterine factor5252NS
 Male Factor1101068683NS
 Anovulation33322420NS
 Endometriosis47483426NS
 Sexual Dysfunction3226NS
 Immunological1010NS
 Unexplained9888NS
Oocyte retrieved (n)b11(8–14)10(7–13)10(7–14)10(7–13)NS
Fertilized oocyte (n)b6(4–9)6(4–8)6(4–8)5.5(4–8.75)NS
Available embryos (n)b, e3(2–6)3(2–5)3(2–5.8)3(2–4)NS
Transferred embryo gradeb, d, f4(4–4)4(4–4)4(4–4)4(4–4)NS
  1. NS Non-significant
  2. aP value was calculated using Chi-square test
  3. bP value was calculated using Kruskal-Wallis test
  4. cOther fertilization methods include ICSI, MESA, TESA
  5. dMissing observations were removed (4 in LH baseline, 1 in E2 baseline, 7 in both LH and E2 at trigger and 38 in FSH, 4 in Transferred embryo grade)
  6. eAvailable embryos are the sum of frozen and transferred embryos
  7. fTransferred embryo grade of a cycle is the highest grade of all transferred embryo