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A slightly seasonal breeding pattern, with progesterone values tend to be higher from February to October (0.38 [0.25\u20131.07] ng\/mL) was inferred. During pregnancy, serum progesterone concentrations range from 10.54 \u00b1 8.74 ng\/mL (indexed month post\u2010conception [IMPC] 0) to 25.49 \u00b1 12.06 ng\/mL (IMPC 2), and display a bimodal pattern with 2 peaks in early\u2010 (25.49 \u00b1 12.06 ng\/mL, IMPC 2) and late\u2010pregnancy (21.71 \u00b1 10.25 ng\/mL, IMPC 12), respectively. Serum estradiol concentrations can seldom be detected in early\u2010pregnancy and increase constantly in mid\u2010 (9.45 \u00b1 1.83 pg\/mL) and late\u2010pregnancy (11.88\u00a0\u00b1 3.81 pg\/mL), with a spike (15.45 \u00b1 6.78 pg\/mL) 1 month prior to delivery. Serum testosterone concentrations elevate significantly in IMPC 7 (0.36\u00a0\u00b1 0.10\u00a0ng\/mL) compared to other months (0.16\u00a0\u00b1 0.10\u00a0ng\/mL) of the year. The present study provides normal concentration profiles for some reproductive hormones in female Indo\u2010Pacific bottlenose dolphins and can contribute to the breeding monitoring of this species. Also, our study would shed further light on the reproductive physiology of small cetaceans.<\/jats:p>","DOI":"10.1111\/1749-4877.12491","type":"journal-article","created":{"date-parts":[[2020,9,23]],"date-time":"2020-09-23T00:46:49Z","timestamp":1600822009000},"page":"575-585","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Sexual maturity, seasonal estrus, and gestation in female Indo\u2010Pacific bottlenose dolphins <i>Tursiops aduncus<\/i> inferred from serum reproductive hormones"],"prefix":"10.1111","volume":"16","author":[{"given":"Peijun","family":"ZHANG","sequence":"first","affiliation":[{"name":"Marine Mammal and Marine Bioacoustics Laboratory Institute of Deep\u2010sea Science and Engineering Chinese Academy of Sciences  Sanya China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhengzhi","family":"WEI","sequence":"additional","affiliation":[{"name":"Marine Mammal and Marine 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